Log in

Relevant bibliographies by topics / Trawling / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Trawling.

Dissertations / Theses on the topic 'Trawling'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Trawling.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Udoff, Geoffrey. "An Alternate Trawling Method: Reduced Bycatch and Benthic Disturbance Achieved with the Wing Trawling System." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2217.

Full text

Abstract:

The Wing Trawling System (WTS) was tested as an alternative to traditional shrimp capture methods in the Gulf. Compared to an otter trawl, this trawl was conceived to reduce bycatch, retain shrimp catch, and minimize seafloor disturbance. Through seventy-one paired tows, the WTS was assessed against a standard otter trawl. The WTS was found to reduce bycatch by 63-65% and reduce shrimp catch by 30-35%. Additionally, I measured the depth of the scars produced by both trawls and quantified the turbidity of the plumes behind them. The scars left by the WTS and the otter trawl were between 9.9 cm-

APA, Harvard, Vancouver, ISO, and other styles

2

Alves, Fábio Rui Lima. "Traits of benthic assemblages subjected to different trawling pressure." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/12618.

Full text

Abstract:

Mestrado em Biologia Marinha<br>Over time, fishing techniques improved as a response to the needs of Human populations. Alongside with the increase of fishing activities important changes in the marine ecosystems were also observed (e.g. overexploitation of stocks and habitat loss or degradation). Overfishing, bycatch, discards and ghost-fishing are some of the most discussed impacts of fishing activities, but the effect of bottom trawling should not be underestimated, since it has been proven to have a significant impact of benthic communities. Up to now the knowledge about fisheries impac

APA, Harvard, Vancouver, ISO, and other styles

3

Sterling, David J. "Modelling the physics of prawn trawling for fisheries management /." The Gap, Qld. : Sterling Trawl Gear Services, 2005. http://adt.curtin.edu.au/theses/available/adt-WCU20050921.093622.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Sterling, David John. "Modelling the physics of prawn trawling for fisheries management." Thesis, Curtin University, 2005. http://hdl.handle.net/20.500.11937/2573.

Full text

Abstract:

Management of prawn trawling fisheries is a difficult task due to the competing interests of strongly motivated stakeholders and interest groups. This occurs because prawn trawling operations are technically complex, require large capital investments and exhibit high running costs while owners have limited property rights over the resources that they harvest. Prawn stocks are public resources and are managed with a view to provide maximum benefit to the broad community. Additionally their exploitation also involves the incidental capture of significant numbers of other animals of no commercial

APA, Harvard, Vancouver, ISO, and other styles

5

Sterling, David John. "Modelling the physics of prawn trawling for fisheries management." Curtin University of Technology, School of Physical Sciences, 2005. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=16093.

Full text

Abstract:

Management of prawn trawling fisheries is a difficult task due to the competing interests of strongly motivated stakeholders and interest groups. This occurs because prawn trawling operations are technically complex, require large capital investments and exhibit high running costs while owners have limited property rights over the resources that they harvest. Prawn stocks are public resources and are managed with a view to provide maximum benefit to the broad community. Additionally their exploitation also involves the incidental capture of significant numbers of other animals of no commercial

APA, Harvard, Vancouver, ISO, and other styles

6

Bloomfield, Helen J. "Compliance and control : a multidisciplinary assessment of prohibited trawling areas." Thesis, University of Newcastle Upon Tyne, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613446.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Stella, Leonie. "Trawling deeper seas : the gendered production of seafood in Western Australia /." Access via Murdoch University Digital Theses Project, 1998. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040913.155811.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Magorrian, Bridgeen Helen. "The impact of commercial trawling on the benthos of Strangford Lough." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318751.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Britton, Adam Robert Corden. "Flight performance, echolocation and prey capture behaviour in trawling Myotis bats." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319104.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Stella, Leonie C. "Trawling deeper seas: the gendered production of seafood in Western Australia." Thesis, Stella, Leonie C. (1998) Trawling deeper seas: the gendered production of seafood in Western Australia. PhD thesis, Murdoch University, 1998. https://researchrepository.murdoch.edu.au/id/eprint/346/.

Full text

Abstract:

This thesis explores the sexual division of labour in three worksites associated with the Western Australian Fishing industry: fishers' households, a seafood processing company and fishing vessels. There has been no previous substantial study of the labour of women in Australian fishing industries. My research has been primarily undertaken by interviewing women and men who work in the Western Australian fishing industry, and my findings are presented through a comparison with overseas literature relative to each site. As I found, in the households of fishermen, women do unpaid and unde

APA, Harvard, Vancouver, ISO, and other styles

11

Stella, Leonie C. "Trawling Deeper Seas: the Gendered Production of Seafood in Western Australia." Murdoch University, 1998. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040913.155811.

Full text

Abstract:

This thesis explores the sexual division of labour in three worksites associated with the Western Australian Fishing industry: fishers' households, a seafood processing company and fishing vessels. There has been no previous substantial study of the labour of women in Australian fishing industries. My research has been primarily undertaken by interviewing women and men who work in the Western Australian fishing industry, and my findings are presented through a comparison with overseas literature relative to each site. As I found, in the households of fishermen, women do unpaid and underval

APA, Harvard, Vancouver, ISO, and other styles

12

Houston, Robert Duncan. "Prey detection and evaluation by echolocation in aerial feeding and trawling bats." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Samy-Kamal, Mohammed. "Evaluation of some management measures for trawling fishery of the western Mediterranean." Doctoral thesis, Universidad de Alicante, 2014. http://hdl.handle.net/10045/45169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Simpson, Anne W. "An Investigation of the Cumulative Impacts of Shrimp Trawling on Mud Bottom Fishing Grounds in the Gulf of Maine: Effects on Habitat and Macrofaunal Community Structure." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/SimpsonAW2003.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Paradis, Vilar Sarah. "Physical and Biogeochemical Impacts of Deep Bottom Trawling in Sedimentary Environments of the Western Mediterranean." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670718.

Full text

Abstract:

La pesca d’arrossegament és considerada una de les activitats antròpiques més nocives pel medi marí, degut a la seva extensió global, i l’elevada freqüència i intensitat. Com que aquest art està en contacte continu amb el fons marí, pot modificar la morfologia del fons i resuspendre grans volums de sediment, que poden ser advectats, erosionant els caladors i alterant les propietats del sediment. Amb la expansió global de la pesca d’arrossegament a caladors més profunds des dels anys 1950, s’estima que els impactes ocasionats per aquesta activitat poden ser intensificats, però encara hi ha una

APA, Harvard, Vancouver, ISO, and other styles

16

Mafwila, Samuel Kakambi. "Ecosystem effects of bottom trawling in the Benguela current system : experimental and retrospective data analyses." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11664.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Dorn, Martin William. "Hierarchical models of fishing behavior by factory trawlers in midwater-trawl fishery for Pacific hake (Merluccius productus) /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/5288.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Gilkinson, Kent Dennis. "Impacts of otter trawling on infaunal bivalves living in sandy bottom habitats on the Grand Banks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ54847.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Cotterell, Stephen Paul. "Fish landings, discards and benthic material from demersal trawling in the western English Channel (ICES VIIe)." Thesis, University of Plymouth, 2006. http://hdl.handle.net/10026.1/2751.

Full text

Abstract:

This study examined the impact of inshore single boat otter trawling from Newlyn, Looe, Plymouth and Salcombe and pair boat demersal trawling from Looc and Plymouth on the benthic environment off the SW peninsula of the UK between 1998 and 2000. Fish and shellfish species (54 and 11 species respectively) were measured at sea and the non-fish material (124 species) was analysed later. Overall 79.8 % of the sample was landed fish and shellfish, 15.8 % was discarded fishes and 4.4 % was invertebrates and other material (by weight). Related information about the substrate and tide were generated f

APA, Harvard, Vancouver, ISO, and other styles

20

Di, Maio Federico <1985&gt. "Spatial based approach to fisheries management. An application to bottom trawling in the strait of Sicily." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10422/1/PhD%20Final%20Thesis_Federico%20Di%20Maio.pdf.

Full text

Abstract:

At the beginning of my thesis project, considering that some stocks are in overfishing status due to both high fishing effort and high level of juveniles in the catch, my main purpose was to understand how to contribute to improving the state of the fishery resources of the Mediterranean Sea. To mitigate the overfishing, the General Fisheries Commission for the Mediterranean (GFCM) adopted several Fishery Restricted Areas, which are geographically defined areas where some specific fishing activities are temporarily or permanently banned or restricted in order to reduce the exploitation patter

APA, Harvard, Vancouver, ISO, and other styles

21

Knight, Emily P. "The Effects of Trawling on Benthic Habitats: An Analysis of Recovery in the Western Gulf of Maine Closure." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/KnightEP2005.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Atkinson, Lara Jane. "Effects of demersal trawling on marine infaunal, epifaunal and fish assemblages: studies in the southern Benguela and Oslofjord." Doctoral thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/6224.

Full text

Abstract:

This thesis investigates the impacts of the demersal trawl fishery on infaunal, epifaunal and fish assemblages in the southern Benguela upwelling system for the first time. In the absence of representative areas of similar habitat protected from trawling in the southern Benguela region, infaunal and epifaunal assemblages were compared between heavily and lightly trawled areas to assess the impacts of the otter-trawl fishery. Infauna were sampled at four sites, from southern Namibia to near Cape Town by means of five replicate grab samples at each paired heavily and lightly trawled area. Invert

APA, Harvard, Vancouver, ISO, and other styles

23

Jayiya, Terence Phinda. "Modelling the relative impacts of trawling and longlining on Cape hake Merluccius capensis on the inshore Agulhas bank." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/6105.

Full text

Abstract:

Bibliograpy: leaves 87-101.<br>A Geographic Information System (GIS) is used to elucidiate vertical and horizontal patterns of distribution of Merluccius capensis on the inshore south coast (20°-27°E) of South Africa. Catch data used to compare the size distribution in catches made by commercial trawls and longlines off the South Coast (20°E). Results show that M.capensis size increases with depth and that the distribution of fish < 30 cm is mostly west of 23° E with isolated pockets east of that region. No seasonal differences were found in the distribution of this species. Spatial mapping of

APA, Harvard, Vancouver, ISO, and other styles

24

Fraser, Helen M. "Do fish predators in the North Sea live beyond their means is prey production sufficient to meet consumption? /." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24693.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Babcock, Elizabeth A. "Dynamic programming models of fishermen's choice of target species assemblage in the U.S. west coast groundfish trawl fishery /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/5340.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

McCallum, Barry R. "The impact of mobile fishing gear on benthic habitat and the implications for fisheries management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62398.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Wolf, Milena Regina [UNESP]. "Ecologia das populações e comunidades dos camarôes Decapoda no litoral norte de Santa Catarina." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/113943.

Full text

Abstract:

Made available in DSpace on 2015-01-26T13:21:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-02-27Bitstream added on 2015-01-26T13:30:32Z : No. of bitstreams: 1 000792978_20150127.pdf: 384795 bytes, checksum: e2d28327453e133ac0c4f145810767c2 (MD5) Bitstreams deleted on 2015-01-30T18:23:36Z: 000792978_20150127.pdf,Bitstream added on 2015-01-30T18:24:05Z : No. of bitstreams: 1 000792978.pdf: 3958190 bytes, checksum: 616d234386031ca87d88755d7374b280 (MD5)<br>Frente aos impactos causados pela ação antrópica no ambiente marinho, a proposta desse trabalho foi fornecer subsídios para a c

APA, Harvard, Vancouver, ISO, and other styles

28

Wolf, Milena Regina. "Ecologia das populações e comunidades dos camarôes Decapoda no litoral norte de Santa Catarina /." Botucatu, 2014. http://hdl.handle.net/11449/113943.

Full text

Abstract:

Orientador: Antonio Leão Castilho<br>Banca: Maria Lúcia Negreiros Fransozo<br>Banca: Sérgio Rosso<br>Resumo: Frente aos impactos causados pela ação antrópica no ambiente marinho, a proposta desse trabalho foi fornecer subsídios para a conservação das espécies, na área adjacente à Baía da Babitonga, estado de Santa Catarina, Brasil. O objetivo foi inventariar as espécies existentes da comunidade de camarões marinhos, detectar e descrever padrões gerais na sua distribuição espaço-temporal e relação às variáveis ambientais que caracterizam seu habitat. Portanto, foram mensurados os índices ecológ

APA, Harvard, Vancouver, ISO, and other styles

29

Winger, Paul D. "Swimming endurance of American plaice (Hippoglossoides platessoides) and Atlantic cod (Gadus morhua) : implications for catchability by otter trawls /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36193.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Piredda, Laura. "Sustainability and valorization of small pelagics: implementation of a shark-free eco-label for pelagic trawling fisheries in the Adriatic Sea." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20441/.

Full text

Abstract:

This study analyses the willingness of consumers to pay an extra price for shark-free eco-label products of fresh small pelagics compared to the ordinary ones. The data collected for this study derives from a contingent valuation survey conducted among 200 consumers, in Ravenna and Pavullo nel Frignano, in a fish market and a supermarket each. There have been administrated further questionnaires to one wholesaler and to the sales manager of the two fishmongers and two supermarkets per town. Open-ended questions of the consumers’ questionnaires have been analysed through cross section linear

APA, Harvard, Vancouver, ISO, and other styles

31

Foster, Sarah Jane. "Is bycatch a big problem for small fish? Assessing and addressing the impacts of tropical shrimp trawling on small fish species." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/17458.

Full text

Abstract:

My research, focused on the industrial shrimp fishery in southern Gulf of California, aimed to determine whether tropical shrimp trawling is a problem for viability of incidentally captured small fish species. My first objective was to use life history information to evaluate possible impacts on four small fish species from their incidental capture. I applied length based indicators and qualitative criteria to information on captured sizes, reproduction, and distributions across the study site. My results suggested potential for overfishing silver stardrum and bigscale goatfish, largely becaus

APA, Harvard, Vancouver, ISO, and other styles

32

Lobo, Aaron Savio. "The dynamics and impacts of trawl fishing along the Coromandel Coast of India." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609292.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Maree, R. C. "Environmental influences on the daytime vertical distribution of Cape hakes and implications for demersal trawl estimates of hake abundance off the west coast of South Africa." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1005122.

Full text

Abstract:

The demersal fishery off the west coast of South Africa experiences decreased catches per unit effort of hake, Merluccius capensis and M. paradoxus, following the onset of strong south easterly winds. Research has demonstrated that, during daylight hours, Cape hakes migrate vertically in the water column in response to strong south easterly winds, decreasing their availability to the bottom trawl. Hydroacoustic, trawl and environmental data were collected off the West Coast during both calm and wind-swept periods in an attempt to understand the forces that initiate this behaviour, its spatial

APA, Harvard, Vancouver, ISO, and other styles

34

Nenadovic, Mateja. "The Effects of Bottom-Tending Mobile Fishing Gear and Fiber-Optic Cable Burial on Soft-Sediment Benthic Community Structure." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/NenadovicM2009a.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Monteiro, Herbert Silva. "Análise quali-quantitativa dos Sciaenidae na pesca do camarão sete-barbas (Xiphopenaeus kroyeri), litoral de Santa Catarina Brasil." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/1830.

Full text

Abstract:

Made available in DSpace on 2016-06-02T19:30:05Z (GMT). No. of bitstreams: 1 6288.pdf: 1832069 bytes, checksum: 1b60b16b4da05304f9c4aadf5802ae6b (MD5) Previous issue date: 2014-06-04<br>Trawling with network-of-doors practiced by the artisanal fleet directed to-bobshrimp Xiphopenaeus kroyeri in central and northern coast of Santa Catarina is an efficient way to capture the target species. However, it has low selectivity and incidentally capture large contingent of demersal and benthic fauna, grouped on the designation of bycatch species, part of this is compounded by the Sciaenidae comprisin

APA, Harvard, Vancouver, ISO, and other styles

36

Chen, Dayuan. "Taiwanese offshore (distant water) fisheries in Southeast Asia, 1936-1977." Connect to this title online, 2007. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20070328.92412.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Walmsley, Sarah Ann. "The assessment and management of bycatch and discards in the South African demersal trawl fishery." Thesis, Rhodes University, 2005. http://hdl.handle.net/10962/d1005071.

Full text

Abstract:

Over the past few decades it has become recognised that an ecosystem approach is required to manage world fisheries. Management strategies must ensure that non-target (bycatch) as well as target catches are sustainable. To achieve this, detailed commercial catch and biological information is required. The composition of catches made by trawlers operating off the south and west coasts of South Africa was investigated. Distinct fishing areas were identified on each coast, based on target species and fishing depth. Catch composition differed markedly among the areas defined. Although hake Merlucc

APA, Harvard, Vancouver, ISO, and other styles

38

Getabu, Albert. "A combined hydro-acoustic and bottom trawling study on the biomass distribution and population dynamics of the Nile perch, Lates niloticus in Lake Victoria, East Africa." Thesis, University of Hull, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Wassenberg, Theodore John. "Fate of selected species of the by-catch from prawn trawlers in Moreton Bay, Queensland." Thesis, Queensland University of Technology, 1987. https://eprints.qut.edu.au/35933/1/35933_Wassenberg_1987.pdf.

Full text

Abstract:

Studies of the fate of discarded by-catch were carried out in the Moreton bay prawn trawl fishery between September 1983 and March 1986. These studies included the determination of the by-catch biomass composition as well as assessing the impact of trawling and various handling times on damage and mortality. The by-catch was made up of 52% Crustacea, 15% elasmobranchs, 8% bony fish, 18% chinoderms, 3% cephalopods and 4% debris by weight. Portunus elagicus represented ~5% of the crustacean biomass and the lpheids nearly 2.0% and of the bony fishes, cardinal fish represented 13%, winter whiti

APA, Harvard, Vancouver, ISO, and other styles

40

Muntadas, Olivé Alba. "Benthic communities' response to different trawling impact levels: generalization towards developing a Mediterranean model = Resposta de les comunitats bentòniques a diferents nivells d’impacte de pesca d’arrossegament: generalització per al desenvolupament d’un model mediterrani." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/385357.

Full text

Abstract:

Fisheries management has definitively embraced the Ecosystem Approach to Fisheries (EAF) philosophy and new management policies are incorporating integrative measures that take into account not only target species but also other ecosystem and socioeconomic elements involved in the fisheries system. In this context, the main aim of this thesis is to assess benthic community (infauna and epifauna) response to commercial trawling in the Mediterranean continental shelf in order to increase the scientific knowledge necessary for an EAF implementation. This aim is addressed within an integrated fram

APA, Harvard, Vancouver, ISO, and other styles

41

Angonesi, Luciana Garcia. "Dinâmica de curto prazo da macrofauna betônica em uma enseada estuarinada Lagoa dos Patos: efeitos antrópicos e mecanismos de persistência e resiliência." reponame:Repositório Institucional da FURG, 2005. http://repositorio.furg.br/handle/1/4050.

Full text

Abstract:

Tese(doutorado) - Universidade Federal do Rio Grande, Programa de Pós–Graduação em Oceanografia Biológica, Instituto de Oceanografia, 2005.<br>Submitted by Cristiane Gomides (cristiane_gomides@hotmail.com) on 2013-10-11T14:35:10Z No. of bitstreams: 1 Luciana.pdf: 2390598 bytes, checksum: de111a9f52b7b4847e9447d50f43891d (MD5)<br>Approved for entry into archive by Sabrina Andrade (sabrinabeatriz@ibest.com.br) on 2013-10-17T17:43:17Z (GMT) No. of bitstreams: 1 Luciana.pdf: 2390598 bytes, checksum: de111a9f52b7b4847e9447d50f43891d (MD5)<br>Made available in DSpace on 2013-10-17T17:43:17Z (GMT). N

APA, Harvard, Vancouver, ISO, and other styles

42

Thomas, Nathan D. "Trawl and gill net selectivity of yellow perch in southern Lake Michigan, 1993-2006." Virtual Press, 2007. http://liblink.bsu.edu/uhtbin/catkey/1366503.

Full text

Abstract:

Selectivity of trawl and experimental gill nets was determined for yellow perch taken from southern Lake Michigan in 1993 to 2006. Gill nets were comprised of 51-, 64-and 76-mm size mesh and showed female modal lengths of 205-, 245-, and 295-mm, respectively, while values for males were 200-, 230-, and 267-mm. Differences between females and males increased with mesh size and was significant. Comparison of nine anterior morphometric features of female and male fish indicated no differences in shape were identified that would cause the disparity in selectivity. Rather, differences in male and f

APA, Harvard, Vancouver, ISO, and other styles

43

Klaer, Neil L., and n/a. "Changes in the structure of demersal fish communities of the South Eastern Australian Ccontinental Shelf from 1915 to 1961." University of Canberra. Resource, Environmental & Heritage Sciences, 2006. http://erl.canberra.edu.au./public/adt-AUC20060804.154133.

Full text

Abstract:

Haul-by-haul steam trawler catch and effort data for 1918�23, 1937�43 and 1952�57, which covers a large portion of the history of steam trawling in the Australian South East Fishery, were examined in detail for the first time. There were 64,371 haul records in total. The catch-rate for all retained catch combined shows a strong decline overall, with a brief recovery during World War II, probably due to increased retention of previously discarded species. The fishing fleet moved to more distant fishing grounds and deeper waters as the catch-rate declined. The catch-rates of the main commercial

APA, Harvard, Vancouver, ISO, and other styles

44

Sousa, Aline Nonato de. "Biologia e ecologia do siri candeia Achelous spinimanus (Latreille, 1819) (crustacea, decapoda, portunoidea) em três enseadas da costa sudeste do Brasil." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152231.

Full text

Abstract:

Submitted by ALINE NONATO DE SOUSA null (alinensousa1@gmail.com) on 2017-11-30T22:22:41Z No. of bitstreams: 1 SOUSA, A.N - BIOLOGIA E ECOLOGIA DE A.spinimanus.pdf: 3014087 bytes, checksum: 23b8e6cb1bad861f8c27a13900d0658c (MD5)<br>Submitted by ALINE NONATO DE SOUSA null (alinensousa1@gmail.com) on 2017-12-04T14:43:24Z No. of bitstreams: 1 SOUSA, A.N - BIOLOGIA E ECOLOGIA DE A.spinimanus.pdf: 3014087 bytes, checksum: 23b8e6cb1bad861f8c27a13900d0658c (MD5)<br>Submitted by ALINE NONATO DE SOUSA null (alinensousa1@gmail.com) on 2017-12-05T14:11:15Z No. of bitstreams: 1 SOUSA, A.N - BIOLOGIA

APA, Harvard, Vancouver, ISO, and other styles

45

Payo, Payo Marta. "Modélisation du transport sédimentaire et des interactions morphodynamiques par les courants de turbidité dans les canyons sous-marins. Application à la Méditerranée Occidentale." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0117/document.

Full text

Abstract:

Les courants de turbidité dans les canyons sous-marins contribuent largement au transfert sédimentaire à travers des marges continentales. L’étude géologique des canyons sous-marins et des systèmes turbiditiques associés a permis des avancées fondamentales dans la compréhension de l’évolution des courants de turbidité.Ces études sont cependant limitées à des interprétations a posteriori, basées sur la répartition des dépôts et des évidences morphologiques. Cette thèse vise à l’application de la modélisation numérique des courants de turbidité, sur la base des processus physiques, à deux canyon

APA, Harvard, Vancouver, ISO, and other styles

46

Mallol, i. Martínez Sandra. "Anàlisi dels descartaments efectuats per la flota d'arrossegament en el Golf de Lleó." Doctoral thesis, Universitat de Girona, 2005. http://hdl.handle.net/10803/7654.

Full text

Abstract:

La pesca d'arrossegament practicada al mar Mediterrani incideix sobre un rang batimètric molt ampli i afecta a nombrosos tipus de fons que presenten comunitats molt diversificades, on les espècies de peixos, crustacis, cefalòpodes, altres mol·luscs, equinoderms i d'altres macroorganismes epibentònics interaccionen entre si. D'aquí la importància de caracteritzar amb una aproximació multiespecífica els fons explotats, com la que aquí hem dut a terme, prenent en consideració no tan sols les espècies d'interès comercial sinó totes les espècies que conformen la comunitat. <br/>Els objectius concre

APA, Harvard, Vancouver, ISO, and other styles

47

Abdou, Khaled. "Evaluation des impacts environnementaux du chalutage de fond et de l'aquaculture en Tunisie : approche comparative par les Analyses de Cycle Vie (ACV)." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0141/document.

Full text

Abstract:

L'aquaculture et la pêche impactent l'environnement, les ressources et le fonctionnement des écosystèmes. L’un des enjeux en écologie est de placer ces activités anthropiques dans un cadre de développement durable. Afin de quantifier et de limiter ces impacts, différentes méthodes d’évaluation environnementale ont vu le jour. L’Analyse de Cycle de Vie (ACV) est une méthode pertinente pour évaluer le bilan environnemental d'un produit en prenant en compte l’ensemble de ses étapes de vie, "du berceau à la tombe", depuis l’extraction des matières premières et leurs transformations pour l'élaborat

APA, Harvard, Vancouver, ISO, and other styles

48

Mengual, Baptiste. "Variabilité spatio-temporelle des flux sédimentaires dans le Golfe de Gascogne : contributions relatives des forçages climatiques et des activités de chalutage." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0109/document.

Full text

Abstract:

L'étude de la variabilité spatio-temporelle des flux sédimentaires sous l'influence des forçages naturels et des activités de chalutage a été entreprise à l'échelle du plateau continental du Golfe de Gascogne, en associant des données in situ et une modélisation numérique 3D déterministe. Deux campagnes en mer spécifiques ont été menées pour quantifier les impacts physiques induits par un chalut professionnel au niveau de la Grande-Vasière, en termes de remise en suspension (panache turbide), et de perturbation de la structure et de la nature du sédiment superficiel. Ces données ont permis d'e

APA, Harvard, Vancouver, ISO, and other styles

49

Vallée, Vincent. "Changements à long terme de la structure et de la diversité des peuplements de poissons de fond du plateau continental de Guyane Functional richness and turnover patterns reveal assembly rules structuring marine fish communities on the continental shelf of French Guiana Diversity recovery and temperature induced species shift in tropical marine fish communities after a trawling fishery collapse Local and regional assembly rules on a long time period in marine fish communities on the continental shelf of French Guiana." Thesis, Guyane, 2020. http://www.theses.fr/2020YANE0004.

Full text

Abstract:

Dans le contexte actuel de surpêche et de réchauffement climatique, il est nécessaire d’adopter une gestion écosystémique des ressources halieutiques. Ce travail de thèse apporte des éléments de réponse à cette problématique en se penchant sur le cas de la pêcherie crevettière guyanaise et de son impact sur les communautés de poissons associées. Comme dans la plupart des régions tropicales, les eaux côtières de Guyane se sont réchauffées d’environ 1°C entre 1990 et 2017. En revanche, comme dans peu d’endroits au monde, la pression de pêche s’est quasiment effondrée sur cette même période. Ce c

APA, Harvard, Vancouver, ISO, and other styles

50

Abdou, Khaled. "Evaluation des impacts environnementaux du chalutage de fond et de l'aquaculture en Tunisie : approche comparative par les Analyses de Cycle Vie (ACV)." Electronic Thesis or Diss., Brest, 2017. http://www.theses.fr/2017BRES0141.

Full text

Abstract:

L'aquaculture et la pêche impactent l'environnement, les ressources et le fonctionnement des écosystèmes. L’un des enjeux en écologie est de placer ces activités anthropiques dans un cadre de développement durable. Afin de quantifier et de limiter ces impacts, différentes méthodes d’évaluation environnementale ont vu le jour. L’Analyse de Cycle de Vie (ACV) est une méthode pertinente pour évaluer le bilan environnemental d'un produit en prenant en compte l’ensemble de ses étapes de vie, "du berceau à la tombe", depuis l’extraction des matières premières et leurs transformations pour l'élaborat

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!