Relevant bibliographies by topics / Egg-bearing female

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Academic literature on the topic 'Egg-bearing female'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Egg-bearing female"

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Ohba, Shin-ya, Noboru Okuda, and Shin-ichi Kudo. "Sexual selection of male parental care in giant water bugs." Royal Society Open Science 3, no. 5 (2016): 150720. http://dx.doi.org/10.1098/rsos.150720.

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Paternal care can be maintained under sexual selection, if it helps in attracting more mates. We tested the hypothesis in two giant water bug species, Appasus major and Appasus japonicus , that male parental care is sexually selected through female preference for caring males. Females were given an opportunity to choose between two males. In the first test of female mate choice, one male carried eggs on its back, while the other did not. The egg status was switched between these two males in the second test. The experiment revealed that females of both species preferred caring males (i.e. egg-
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Keller, Claudia. "Assessment of reproductive state in the turtle Mauremys leprosa: a comparison between inguinal palpation and radiography." Wildlife Research 25, no. 5 (1998): 527. http://dx.doi.org/10.1071/wr97013.

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Inguinal palpation and radiography were carried out simultaneously on a sample of 387 adult female Mediterranean turtles, Mauremys leprosa, to assess the presence of calcified oviductal eggs. A significantly higher frequency of pregnant females was obtained through radiography. Egg-bearing females (as shown on radiographs) with positive palpation tended to have significantly larger clutches than did females with negative palpation. Clutches in the earlier calcification stages were less likely to be detected by palpation than were more calcified eggs. The frequency of positive palpations of egg
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Lyons, D. O., and J. J. Dunne. "Inter- and intra-gender analyses of feeding ecology of the worm pipefish (Nerophis lumbriciformis)." Journal of the Marine Biological Association of the United Kingdom 84, no. 2 (2004): 461–64. http://dx.doi.org/10.1017/s0025315404009452h.

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Small vagile epiphytic crustaceans formed the greatest proportion of the diet of worm pipefish. There were significant differences in the number (Mann–Whitney U=22006·5, P<0·001) and diversity (Mann–Whitney U=11546·0, P<0·05) of prey consumed by male and female pipefish. Harpacticoid copepods are the most numerically dominant form of prey consumed. Further gender analysis of mature pipefish revealed that reproductively mature females and egg-bearing male worm pipefish show significantly greater predatory effort (Kruskal–Wallis H=24·15, df=2, P<0·001). Increased feeding activity, withi
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Al-Marzouqi, Abdulaziz, Johan C. Groeneveld, Abdullah Al-Nahdi, and Ahmed Al-Hosni. "Reproductive Season of the Scalloped Spiny Lobster Panulirus homarus Along the Coast of Oman: Management Implications." Journal of Agricultural and Marine Sciences [JAMS] 13 (January 1, 2008): 33. http://dx.doi.org/10.24200/jams.vol13iss0pp33-42.

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The spiny lobster Panulirus homarus is widely distributed in the Indo-West Pacific. Along the coast of Oman it supports an artisanal fishery using traps and tangle nets. The egg-bearing incidence of females caught between 1989 and 2006 were analysed relative to month, lobster size and location of capture. The smallest female with external eggs had a carapace length (CL) of 54.6 mm, but only 9–18% of females of 60–69 mm CL carried eggs. This percentage increased significantly above 70 mm CL, and on average, 63% of individuals >90 mm carried eggs. Egg-bearing increased seasonally at the onset
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Zimmermann, Uwe, Fabrício Lopes Carvalho, and Fernando L. Mantelatto. "The reproductive performance of the Red-Algae shrimp Leander paulensis (Ortmann, 1897) (Decapoda, Palaemonidae) and the effect of post-spawning female weight gain on weight-dependent parameters." Brazilian Journal of Oceanography 63, no. 3 (2015): 207–16. http://dx.doi.org/10.1590/s1679-87592015085806303.

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AbstractDecapod species have evolved with a variety of reproductive strategies. In this study reproductive features of the palaemonid shrimp Leander paulensiswere investigated. Individuals were collected in the coastal region of Ubatuba, São Paulo, Brazil. In all, 46 ovigerous females were examined in terms of the following reproductive traits: fecundity, reproductive output, brood loss and egg volume. Leander paulensis produces a large number of small eggs with an average fecundity of 635 ± 246 eggs. Egg volume increased significantly from early (0.034 ± 0.008 mm3) to late development stage (
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MAZLUM, Yavuz, and Mehmet Fatih CAN. "Causal relationships among the body-related and egg-related traits in crayfish: A case study on Turkish freshwater crayfish Pontastacus leptodactylus (Astacidae: Decapoda)." Journal of Biometry Studies 4, no. 2 (2024): 56–66. https://doi.org/10.61326/jofbs.v4i2.01.

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In this study, the direct and indirect causal relationships among the length, weight, egg diameter, egg weight, and egg quantity of female Pontastacus leptodactylus were analyzed using a path analysis. A total of 79 egg-bearing female crayfish with a total weight (WT; 39.1 ± 16 g) and total length (TL; 109.6 ± 18.1 mm), were sampled from Eğirdir Lake, Türkiye, in 2022 and 2023. Significant direct effects were observed several traits, such as crayfish length and weight, weight and egg diameter, length and egg quantity, egg diameter and egg quantity, weight and egg quantity, length and egg weigh
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Sumpton, WD, MA Potter, and GS Smith. "Parasitism of the commercial sand crab Portunus pelagicus (L.) by the rhizocephalan Sacculina granifera Boschma, 1973 in Moreton Bay, Queensland, Australia." Marine and Freshwater Research 45, no. 2 (1994): 169. http://dx.doi.org/10.1071/mf9940169.

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In Moreton Bay, Queensland, externae of Sacculina granifera Boschma were found in 7.0% of adult males and 123% of adult females of Portunus pelagicus. Infection rates were seasonal for both sexes and higher in the adult female population, with more than 20% of adult females carrying externae during some summer months. Infection rates were less than 3% in areas outside the bay and generally highest in the southern and central bay. Nineteen males and 15 females had abdominal scars where externae had become dislodged. The gonads of most parasitized crabs were underdeveloped, but 5.6% of externa-b
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Templeton, A. R., H. Hollocher, and J. S. Johnston. "The molecular through ecological genetics of abnormal abdomen in Drosophila mercatorum. V. Female phenotypic expression on natural genetic backgrounds and in natural environments." Genetics 134, no. 2 (1993): 475–85. http://dx.doi.org/10.1093/genetics/134.2.475.

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Abstract The abnormal abdomen (aa) syndrome in Drosophila mercatorum depends on the presence of R1 inserts in a third or more of the X-linked 28S rDNA genes and the absence of selective underreplication of inserted repeats in polytene tissues that is controlled by an X-linked locus (ur) half a map unit from the rDNA complex. This syndrome affects both life history and morphology in the laboratory. Because abnormal morphologies are rarely encountered in nature, the purpose of this study is to see if the female life history traits are still affected under more natural genetic backgrounds and env
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Tang, Feng, Marthe Larsen Haarr, Bernard Sainte-Marie, et al. "Spatio-temporal patterns and reproductive costs of abnormal clutches of female American lobster, Homarus americanus, in eastern Canada." ICES Journal of Marine Science 75, no. 6 (2018): 2045–59. http://dx.doi.org/10.1093/icesjms/fsy076.

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Abstract Previous studies have documented female American lobster, Homarus americanus, carrying “abnormal clutches”, i.e. with eggs covering less than half of their abdomen. From 2011 to 2014, we worked alongside harvesters to quantify spatio-temporal patterns and reproductive costs of abnormal clutches among 138 738 egg-bearing female lobsters sampled from 193 homeports spread across eastern Canada. Females with abnormal clutches were ubiquitous, being found in 90% of homeports. Their incidence was, however, relatively low, averaging 6% across sampling times and locations. The incidence decre
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Bhaduri, Ritindra N. "Infections by the trematode Microphallus nicolli and the acanthocephalan Profilicollis altmani in relation to the reproductive condition of their intermediate host, the Pacific mole crab Emerita analoga." Animal Biology 70, no. 4 (2020): 417–25. http://dx.doi.org/10.1163/15707563-bja10038.

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Abstract Parasites can dramatically influence fecundity of their hosts, so for any host species it is important to establish whether parasite infections affect host reproduction. The Pacific mole crab, Emerita analoga, commonly harbors metacercarial cysts of the trematode Microphallus nicolli and cystacanths of the acanthocephalan Profilicollis altmani. Although these helminths are known to infect primarily larger female mole crabs, they may do so disproportionately when tied to their host’s reproductive condition. This study was undertaken to examine differences in parasite prevalence and abu
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Book chapters on the topic "Egg-bearing female"

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Omogiade Idahor, Kingsley. "Avian Reproduction." In Veterinary Medicine and Science. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101185.

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There are about 10,400 living avian species belonging to the class Aves, characterized by feathers which no other animal classes possess and are warm-blooded vertebrates with four-chamber heart. They have excellent vision, and their forelimbs are modified into wings for flight or swimming, though not all can fly or swim. They lay hard-shelled eggs which are a secretory product of the reproductive system that vary greatly in colour, shape and size, and the bigger the bird, the bigger the egg. Since domestication, avian species have been basically reared for eggs, meat, pleasure and research. Th
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