Relevant bibliographies by topics / Fecundity

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Fecundity'

Author: Grafiati
Published: 4 June 2021
Last updated: 27 July 2024

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Journal articles on the topic "Fecundity"

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Parkin, Justine. "Fecundity." Environmental Humanities 9, no. 2 (November 1, 2017): 460–63. http://dx.doi.org/10.1215/22011919-4215423.

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Grover, Stephen. "Cosmological Fecundity." Inquiry 41, no. 3 (September 1998): 277–99. http://dx.doi.org/10.1080/002017498321779.

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Paxman, David. "Our Fecundity." Dialogue: A Journal of Mormon Thought 26, no. 3 (October 1, 1993): 88–89. http://dx.doi.org/10.2307/45228662.

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Mohammed, Titaouine, D. E. Gherissi, Chergui Moussa, and Mohamdi Hanane. "Influence of Region on Some Reproductive Parameters in Ouled Djellal Sheep." Jurnal Ilmu Ternak dan Veteriner 28, no. 4 (December 7, 2023): 220–26. http://dx.doi.org/10.14334/jitv.v28i4.3211.

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The present study aims to assess the reproductive performance of Ouled Djellal ewes at four different Biskra locations: El Hadjeb, SidiOkba, Ouled Djellal, and Chaiba. All flocks were kept under extensive management. For this study, 357 clinically healthy and non-pregnant Ouled Djellal ewes have been used. Mating was practiced in an accessible mode, conducted over two months: May and June 2015 (61 days) for all herds.  The total number of lambing ewes and lambs in all flocks was determined during the lambing period. We compared fertility, fecundity, and prolificacy rates using the χ2 test to verify the relationshipbetween the measured rates and the four sites and multiple comparisons that revealed significant differences. The variables assessed in this study encompassed fecundity, prolificacy, and fertility. The overall mean values obtained were 78% for fecundity, 117% for prolificacy, and 92% for fertility. These averages were significantly lower than those observed in intensively managed herds.  However, the lowest rates were recorded at site 4 (Chaiba), with65% for fertility, 109% for prolificacy, and 71% for fecundity. The results of this study clearly show that the region has a significant effect on fertility (P= 0.001) and fecundity (P= 0.0001) but no significant effect on the prolificacy rate (P= 0.074).
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Shehu, Muhammad Ahmad, Muhammad Bashir Abdullahi, Mohammed Danlami Abdulmalik, and Opeyemi Aderike Abisoye. "User Embedding Long Short-Term Model Based Fecundity Prediction Model Using Proposed Fecundity Dataset." East African Journal of Interdisciplinary Studies 6, no. 1 (February 20, 2023): 37–53. http://dx.doi.org/10.37284/eajis.6.1.1099.

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Fecundity prediction is a process that helps couples to understand their fertility status. Fecundity prediction as a domain could be supported by developed intelligent models using a computational method and fecundity data. Although fecundity data and models have been proposed, the problem of low data size and dimensionality of the proposed fecundity dataset has been identified due to the data collection approaches used and the problem of using a weak subfertility definition in the development of a User-embedding LSTM-based fecundity prediction model. To solve the identified problems, this study proposed a fecundity dataset by adopting a hybrid data collection approach using the strengths and disregarding the setbacks of existing data collection approaches and then proposed an improved User-embedding LSTM-based fecundity prediction model based on an improved subfertility definition. A large size fecundity dataset was generated and used for the implementation and evaluation of the existing and proposed LSTM-based fecundity prediction models and the proposed model generated better AUC-ROC evaluation results
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NEAL, A. T. "Male gametocyte fecundity and sex ratio of a malaria parasite, Plasmodium mexicanum." Parasitology 138, no. 10 (July 15, 2011): 1203–10. http://dx.doi.org/10.1017/s0031182011000941.

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SUMMARYEvolutionary theory predicts that the sex ratio of Plasmodium gametocytes will be determined by the number of gametes produced per male gametocyte (male fecundity), parasite clonal diversity and any factor that reduces male gametes' ability to find and combine with female gametes. Despite the importance of male gametocyte fecundity for sex ratio theory as applied to malaria parasites, few data are available on gamete production by male gametocytes. In this study, exflagellating gametes, a measure of male fecundity, were counted for 866 gametocytes from 26 natural infections of the lizard malaria parasite, Plasmodium mexicanum. The maximum male fecundity observed was 8, but most gametocytes produced 2–3 gametes, a value consistent with the typical sex ratio observed for P. mexicanum. Male gametocytes in infections with higher gametocytaemia had lower fecundity. Male fecundity was not correlated with gametocyte size, but differed among infections, suggesting genetic variation for fecundity. Fecundity and sex ratio were correlated (more female gametocytes with higher fecundity) as predicted by theory. Results agree with evolutionary theory, but also suggest a possible tradeoff between production time and fecundity, which could explain the low fecundity of this species, the variation among infections, and the correlation with gametocytaemia.
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Byrne, Susan, Mark Heverin, Peter Bede, Marwa Elamin, and Orla Hardiman. "Fecundity in ALS." Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration 15, no. 3-4 (January 31, 2014): 204–6. http://dx.doi.org/10.3109/21678421.2013.865237.

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Beardsley, Tim. "Fear and Fecundity." Scientific American 275, no. 6 (December 1996): 36. http://dx.doi.org/10.1038/scientificamerican1296-36.

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Komova, N. I. "Relationship between Fecundity and the Number of Vertebrae in the Roach <i>Rutilus rutilus</i> of the Rybinsk Reservoir." Биология внутренних вод 4, no. 4 (July 1, 2023): 457–63. http://dx.doi.org/10.31857/s0320965223040125.

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The data on the number of vertebrae in the vertebral column regions in different relative fecundity groups of roach are given. The average value of the number of vertebrae in the abdominal region turned out to be the smallest in low fecundity fishes. When comparing the average values of relative fecundity in females with different numbers of vertebrae in the vertebral column, a group of low fecundity fishes was identified. In it, individuals with 17 vertebrae in the abdominal region had a statistically significantly lower relative fecundity, and those with 16 in the caudal and a total of 40 vertebrae in the vertebral column had a significantly higher fecundity than individuals with a different number of vertebrae in these regions. In highly fecundity females, no differences in fecundity between fish with different numbers of vertebrae in regions were noted.
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Hannah, Robert W., Stephen A. Jones, and Michele R. Long. "Fecundity of the ocean shrimp (Pandalus jordani)." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 10 (October 1, 1995): 2098–107. http://dx.doi.org/10.1139/f95-803.

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Fecundity of the ocean shrimp Pandalus jordani was analyzed from eight samples from the years 1989–1993 and compared with historical fecundity data for this species. Linear regressions of loge fecundity on loge carapace length from the 1989–1993 samples had significantly different slopes. Interannual variation in fecundity exceeded that found between areas within the same year, making it difficult to determine if the observed variation in fecundity resulted from geographic location or interannual variation. No consistent differences between the length–fecundity relationships of the recent and historical samples were demonstrated. A graphical comparison of fecundity with sea level height data provided preliminary evidence that sea bottom temperature may be influencing shrimp fecundity. Egg production, estimated from the length–fecundity relationships and from size and sex composition data from the commercial catch, showed wide variation between years and areas. Variation in sex composition explained roughly 62% of the variation in egg production. Egg production estimates, derived from a pooled length–fecundity relationship, deviated from estimates based on the individual samples by ± 13–18%. These deviations were considered to be a minor source of added variance when compared with other sources of variation in the total egg production of ocean shrimp.
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Dissertations / Theses on the topic "Fecundity"

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Priest, Beatrice. "Fecundity and sterility in Dante." Thesis, University of Cambridge, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708536.

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Giolito, Eugenio. "Marriage markets, differential fecundity and search." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1754.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2004.
Thesis research directed by: Economics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Hogg, Jonathan C. "Effects of Plasmodium infection on anopheline mosquito fecundity." Thesis, Keele University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261487.

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Espitia, Paola G. "Survivorship, Growth, and Fecundity of Eunicea flexuosa (Cnidaria: Octocorallia) Transplants." NSUWorks, 2013. http://nsuworks.nova.edu/occ_stuetd/100.

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Octocorals are important components of many reef benthic communities, and efforts to restore populations following damage events and relocating colonies preceding permitted activities is becoming part of regulatory processes. Because many octocorals have regenerative capabilities ideal for removing branch clippings (fragments), they may make excellent donors, sources of transplants, for restoration efforts. This study examined the effect of fragment size, fragmentation timing, and transplantation on the survivorship, growth, and fecundity of Eunicea flexuosa clippings and donor colonies. Eunicea flexuosa clippings 20 cm in height were transplanted to a ship grounding site offshore southeast Florida in April 2010 and November 2010. Data collected during the June through September spawning months in 2010 and 2011 revealed high survivorship among all transplants (85%), however partial mortality from encrustation by bio-fouling organisms ensued. Growth rates among donor colonies was high. The fecundity of fragments transplanted in May was not negatively affected in 2010; however the fecundity of all transplants was lower than that of donor colonies in 2011, with oocytes failing to reach reproductive size. Re-allocation of energy resources towards tissue repair may account for the low growth and loss in fecundity. This study highlights the importance of evaluating fragment size and collection time in promoting growth and propagation of transplanted octocorals following damage and prior to marine construction events.
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Akey, David H., and George D. Butler. "Development and Fecundity of Aphis gossypii (Homoptera: Aphididae) on Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/221233.

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Cotton aphids. Aphis gossypii. from a source near Phoenix. AZ were found to have an optimal developmental temperature of 27.5 °C with a developmental time of 5 days. Fecundity was optimal at 25 °C with 2.85 mean nymphs/day. Both development and fecundity were linear. The optimal temperature for fecundity was higher than those previously reported for cotton aphids in more moderate climates.
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Peters, Anna L. "The Effects of Soil Phosphorus on Acer rubrum Fecundity." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398164024.

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Zhang, Xu. "Fecundity and husband-wife age and education gaps at first marriage." Diss., Online access via UMI:, 2009.

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Khamis, Said A. M. "The Swahili novelist at the crossroad: the dilemma of identity and fecundity." Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-91101.

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\"Are there any national literatures in black Africa yet? The simple answer is no. [...] If one examines the development of the African language literature that do exists, one is struck by certain recurring tendencies. Many of the books produced, particularly the early works, are of a predominantly moralistic nature. Sometimes they are retelling of folk stories or Bible stories, sometimes imitations of European religious literature, sometimes both.\\\" (Lindfors 1997: 121; 123) Certain anomalies are obvious in the above extract. Swahili written literature with its long-standing tradition, dating far back to the 17th century, has relativly gathered its own aesthetic criteria, values and sensibility, hence \\\'own\\\' integrity and world view. I dare say that Lindfors will be suprised to learn today, how fast the Swahili novel has developed since when he had left it when he read Andrzejewski et al (1985) and Gérard (1981), who (by the way), themselves did not then see the their works as presenting a complete picture of African literatures in African languages. This essay aims at showing the predicament of the Swahili novelist at the crossroads and how, in a contemporary situation, s/he works out his or her strategies towards resolving the impasses.
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Taylor, David M. "Aspects of multiparous snow crab (Chionoecetes opilio) fecundity in insular Newfoundland waters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq25892.pdf.

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Long, Tristan Amik Francis. "Of mice, mothers and mirror-images, testing relationships between asymmetry and fecundity." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61920.pdf.

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Books on the topic "Fecundity"

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Fecundity! London: Austin & Maccauley, 2008.

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Mosher, William D. Fecundity and infertility: United States, 1965-82. Hyattsville, Md: National Center for Health Statistics, U.S. Dept. of Health and Human Services, Public Health Service, 1985.

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Skaugstad, Calvin. Fecundity of chinook salmon, Tanana River, Alaska. Anchorage, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1991.

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Lowe-Evans, Mary. Crimes against fecundity: Joyce and population control. Syracuse, N.Y: Syracuse University Press, 1989.

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Mosher, William D. Fecundity and infertility: United States, 1965-82. Hyattsville, Md: National Center for Health Statistics, U.S. Dept. of Health and Human Services, Public Health Service, 1985.

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Mosher, William D. Fecundity and infertility: United States, 1965-82. Hyattsville, Md: National Center for Health Statistics, U.S. Dept. of Health and Human Services, Public Health Service, 1985.

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Nouwen, Henri J. M. Lifesigns: Intimacy, fecundity, and ecstasy in Christian perspective. New York: Image Books / Doubleday, 2003.

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Nouwen, Henri J. M. Lifesigns: Intimacy, fecundity, and ecstasy in Christian perspective. Garden City. N.Y: Doubleday, 1986.

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Mosher, William D. Fecundity and infertility in the United States, 1965-88. [Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics, 1990.

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Mosher, William D. Fecundity and infertility in the United States, 1965-88. [Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics, 1990.

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Book chapters on the topic "Fecundity"

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Falcone, Tommaso, and Rakesh Sharma. "Fecundity." In Encyclopedia of Women’s Health, 472–74. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-0-306-48113-0_158.

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Levinas, Emmanuel. "Fecundity." In Totality and Infinity, 267–69. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-009-9342-6_17.

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Krafsur, E. S., R. D. Moon, R. Albajes, O. Alomar, Elisabetta Chiappini, John Huber, John L. Capinera, et al. "Fecundity." In Encyclopedia of Entomology, 1419. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_3778.

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Newman, John L. "Fecundity." In The New Palgrave Dictionary of Economics, 4487–90. London: Palgrave Macmillan UK, 2018. http://dx.doi.org/10.1057/978-1-349-95189-5_427.

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Ganias, Kostas. "Fecundity." In Encyclopedia of Animal Cognition and Behavior, 1–4. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-47829-6_221-1.

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Newman, John L. "Fecundity." In The New Palgrave Dictionary of Economics, 1–3. London: Palgrave Macmillan UK, 1987. http://dx.doi.org/10.1057/978-1-349-95121-5_427-1.

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Ganias, Kostas. "Fecundity." In Encyclopedia of Animal Cognition and Behavior, 2649–53. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-319-55065-7_221.

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Pandian, T. J. "Fecundity." In Evolution and Speciation in Animals, 186–98. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003176381-22.

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Levinas, Emmanuel. "Transcendence and Fecundity." In Totality and Infinity, 274–77. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-009-9342-6_19.

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Hepburn, H. R., and S. E. Radloff. "Mating and Fecundity." In Honeybees of Africa, 163–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03604-4_6.

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Conference papers on the topic "Fecundity"

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Spector, Lee, Thomas Helmuth, and Kyle Harrington. "Fecundity and selectivity in evolutionary computation." In the 13th annual conference companion. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/2001858.2001932.

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Swiney, K. M., J. B. Webb, G. H. Bishop, and G. L. Eckert. "Temporal and Spatial Variability of Alaska Red King Crab Fecundity, and Accuracy of Clutch Fullness Indices in Estimating Fecundity." In Biology and Management of Exploited Crab Populations under Climate Change. Alaska Sea Grant, University of Alaska Fairbanks, 2011. http://dx.doi.org/10.4027/bmecpcc.2010.11.

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"Is there a fecundity/longevity trade-off under heat stress?" In Bioinformatics of Genome Regulation and Structure/ Systems Biology. institute of cytology and genetics siberian branch of the russian academy of science, Novosibirsk State University, 2020. http://dx.doi.org/10.18699/bgrs/sb-2020-393.

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Benkovskaya, G. V., Yu M. Nikonorov, and T. T. Akhmetkireeva. "STARVATION AND ITS EFFECTS IN EXPERIMENTS ON INSECTS." In V International Scientific Conference CONCEPTUAL AND APPLIED ASPECTS OF INVERTEBRATE SCIENTIFIC RESEARCH AND BIOLOGICAL EDUCATION. Tomsk State University Press, 2020. http://dx.doi.org/10.17223/978-5-94621-931-0-2020-7.

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In the set of experiments with short-living and long-living housefly strains Sh gen and L gen we showed that starvation as restriction of food availability for young adults at reproductive maturation stage caused change of life span and fecundity in parent generation and consecutive offspring generations. Change of viability and developmental time of progeny demonstrated transgenerational nature of starvation stress.
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"Does increasing ewe fecundity reduce whole-farm greenhouse gas emissions intensities?" In 20th International Congress on Modelling and Simulation (MODSIM2013). Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2013. http://dx.doi.org/10.36334/modsim.2013.b2.harrison.

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Utami, Eva, and Okto Supratman. "The Fecundity of Freshwater Prawn(Macrobrachiumrosenbergii) in Menduk River, Bangka, Bangka Belitung." In Proceedings of the International Conference on Maritime and Archipelago (ICoMA 2018). Paris, France: Atlantis Press, 2019. http://dx.doi.org/10.2991/icoma-18.2019.53.

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Fudge, Susan, and George Rose. "Changes in Fecundity in a Stressed Population: Northern Cod (Gadus morhua) off Newfoundland." In Resiliency of Gadid Stocks to Fishing and Climate Change. Alaska Sea Grant College Program, 2008. http://dx.doi.org/10.4027/rgsfcc.2008.10.

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"The investigation of the effective factors in women's fecundity and sexual health improvement." In International Conference on Medicine, Public Health and Biological Sciences. CASRP Publishing Company, Ltd. Uk, 2016. http://dx.doi.org/10.18869/mphbs.2016.22.

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Weng, Ziqing, Chunxi Huang, Juan Shu, Qin Zhang, and Ying Yu. "Notice of Retraction: Effects of Heat Shock on Viability and Fecundity in Tribolium castaneum." In 2011 5th International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5781496.

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Kaiser, Matthew C. "Transgenerational fecundity compensation in the aphidAphis craccivorain response to parasitism by two competing parasitoids." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.115286.

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Reports on the topic "Fecundity"

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Leroux, Marie-Louise, Pierre Pestieau, and Gregory Ponthiere. The optimal design of assisted reproductive technologies policies. CIRANO, June 2022. http://dx.doi.org/10.54932/ezmm9028.

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This paper studies the optimal design of assisted reproductive technologies (ART) policies in an economy where individuals differ in their reproductive capacity (or fecundity) and in their wage. We find that the optimal ART policy varies with the postulated social welfare criterion. Utilitarianism redistributes only between individuals with unequal fecundity and wages but not between parents and childless individuals. To the opposite, ex post egalitarianism (which gives absolute priority to the worst-off in realized terms) redistributes from individuals with children toward those without children, and from individuals with high fecundity toward those with low fecundity, so as to compensate for both the monetary cost of ART and for the disutility from involuntary childlessness resulting from unsuccessful ART investments. Under asymmetric information and in order to solve for the incentive problem, utilitarianism recommends also to either tax or subsidize ART investments of low-fecundity-low productivity individuals depending on the degree of complementarity between fecundity and ART in the fertility technology. On the opposite, ex post egalitarianism always recommends marginal taxation.
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Novoseltsev, Vassili N., James R. Carey, Janna A. Novoseltseva, and Anatoli I. Yashin. Individual fecundity dynamically predicts remaining life expectancy in medflies. Rostock: Max Planck Institute for Demographic Research, November 2006. http://dx.doi.org/10.4054/mpidr-wp-2006-043.

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Büyükkeçeci, Zafer, Mine Kühn, Siri E. Håberg, Cecilia Høst Ramlau-Hansen, and Mikko Myrskylä. Subjective biology: how perceived fecundity influences relationship satisfaction and stability. Rostock: Max Planck Institute for Demographic Research, June 2024. http://dx.doi.org/10.4054/mpidr-wp-2024-012.

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Nugent, Colleen N., and Anjani Chandra. Infertility and Impaired Fecundity in Women and Men in the United States, 2015–2019. Hyattsville, MD: National Center for Health Statistics (U.S.), April 2024. http://dx.doi.org/10.15620/cdc/147886.

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Nachtrieb, Julie. Field site analysis of giant salvinia nitrogen content and salvinia weevil density. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42060.

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In 2012, a giant salvinia (Salvinia molesta Mitchell) biological control project was initiated in Louisiana. Although similar quantities of salvinia weevils (Cyrtobagous salviniae Calder and Sands) were released at all sites, weevil densities were highly variable among sites. Additionally, signs of plant nitrogen depletion (yellowing plants) were observed at some sites. Because it is well known that plant nutrition can affect the success of a biocontrol agent because of slowed development and/or reduced fecundity, the correlation between giant salvinia nitrogen content and Salvinia weevil density was investigated during the growing seasons of the second and fourth years. During 2013, weevils were reintroduced to sites, and the magnitude of adult weevil density increase varied by site. Giant salvinia nitrogen content varied among sites and sampling dates. Upper Big Break plants had greater nitrogen than all other sites during 75% of sampling dates. Additionally, adult and larval densities were significantly correlated to plant nitrogen content. During 2015, trends were less distinct and weevil densities and nitrogen content varied based on the interaction between sampling date and site, but a significant correlation was not detected. Results from 1-yr of a 2-yr study confirmed published reports of the importance of plant nitrogen content to salvinia weevil productivity. Additional studies are warranted to evaluate and understand the role of nitrogen at giant salvinia biocontrol field sites.
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Emmons, Gavin. Prairie and peregrine falcon occupancy and productivity monitoring at Pinnacles National Park: 2023 annual report. National Park Service, 2024. http://dx.doi.org/10.36967/2302448.

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Abstract:
Pinnacles National Park (?Pinnacles?) provides diverse habitats for numerous cliff-nesting raptors, including prairie falcons (Falco mexicanus) and peregrine falcons (F. peregrinus), as well as a spectacular array of summits and cliff-wall routes for rock-climbers. This monitoring program was established to determine long-term trends in the number of occupied territories and productivity of nesting prairie and peregrine falcons. The monitoring program grew out of a need to reduce potential disturbance that climbers and off-trail hikers may have on cliff-nesting raptors. The falcon monitoring program began with a pilot effort in 1984, and after two years of no monitoring efforts in 1985 and 1986, monitoring data have been collected annually from 1987 to the present. This report summarizes the results from the 2023 breeding season and represents the 38th year of monitoring at the park, consistent with the standardized methods and procedures detailed in the Prairie Falcon Monitoring Protocol for Pinnacles National Monument (Emmons et al. 2011). To monitor falcons, field technicians surveyed all potential nest sites three times per breeding season, with visits spaced 21 to 28 days apart. We revisited those nests determined to be active to confirm rearing of nestlings and fledging of young. In 2023, we conducted monitoring from 1 January 2023 until 9 July 2023, with a total of over 150 possible and active nest sites monitored during 870 observation hours. For prairie and peregrine falcons combined, we documented 14 territorial pairs this year, with 12 pairs actively nesting. Six nests successfully fledged 17 young; six nests failed. For prairie falcons specifically, we documented ten territorial pairs, with three nests successfully fledging 10 young. For peregrine falcons, we documented four territorial pairs, with three nests successfully fledging 7 young. Falcon fecundity for the 2023 season was notably lower compared to the 37-year average. The data from 38 years of falcon monitoring at Pinnacles suggest an apparent cyclic population pattern in annual prairie falcon productivity, supplemented by increased peregrine falcon breeding efforts in recent years (Appendix C).
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