Do Male And Female Gammarids Defend Themselves Differently ...-Books Download

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Do male and female gammarids defend themselves differently ...

Do male and female gammarids defend themselves differently ...

Do male and female gammarids defend themselves differently during ... 2. Materials and methods 2.1. Cadmium exposure ... in drinking water, which is 5 gCdL?1 (CD 98 ...

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Do male and female gammarids defend themselves differently ...

Do male and female gammarids defend themselves differently ...

Do male and female gammarids defend themselves differently during chemical stress? E. Gismondi∗, C. Cossu-Leguille, J.-N. Beisel Université de Lorraine, Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Metz F-57070, France a r t i c l e i n f o Article history: Received 18 April 2013 Received in revised ...

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REPRODUCTION IN GAMMARUS (CRUSTACEA, AMPHIPODA): BASIC ...

REPRODUCTION IN GAMMARUS (CRUSTACEA, AMPHIPODA): BASIC ...

108 D. W. SUTCLIFFE In some instances, especially when a female is larger than the male attempting to hold her, she straightens and flexes her abdomen very vigorously, breaks free from the male's grasp and swims away. Apparently the female is exercising a choice over her potential mate. Pheromone attraction by females

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Selective Coupling of Gammarids

Selective Coupling of Gammarids

gammarids and among other crustaceans,' is brought about in a purely mechanical way. The initial encounter of male and female is by accident. Males tend to clasp objects with which they come into contact. A male seized by another male struggles until freed. A female, on the contrary, is passive when clasped, with abdomen

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Mater Ials and Methods - fxdm - main

Mater Ials and Methods - fxdm - main

a male’s perspective, a female’s quality as a mate strongly depends on its proximity to molting. In fact, when presented to 2 unpaired ... especially gammarids, resistance is rare and, if ever, is mostly dis-played by large females (Ward 1984). At any time, females receptive for copulation are scarce and

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THE USE OF THE MALES' GNATHOPODS DURING PRECOPULATION IN ...

THE USE OF THE MALES

the male's gnathopod. In Melita nitida, the point of attachment is the sixth coxal plate (fig. 2, above). As in H. azteca, this site was modified in the female, but not in the male (fig. 2, below). The male's gnathopod and the female's point of attachment fit together like two puzzle pieces.

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Mr. D. M. Reid on Gammarus planicrurus. 287 Length of ...

Mr. D. M. Reid on Gammarus planicrurus. 287 Length of ...

Mr. D. M. Reid on Gammarus planicrurus. 287 Length of caudal peduncle ~ head. ... Since the bristles are much fewer in the female than in the male, they do not always provide a good distinguishing ... like those of other gammarids. It is not proposed to give a definition of the new subgenus here, since there is at present only one species, and ...

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georgehbalazs.com

georgehbalazs.com

Oftentimes, differences in male and female morphology do not manifest themselves in subadult sea turtles, making it difficult to tell the sexes apart. As reported in recent studies, we now can determine the turtle's sex by analyzing the amount of the male hormone testosterone in the blood. What does a sea turtle eat? 2 to 6 weeks before capture ...

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Journal of Zoology - mivegec.ird.fr

Journal of Zoology - mivegec.ird.fr

which the male carries a female beneath his ventral surface for several days before she becomes receptive. In amphipods and isopods, although males may be larger than females, pre-copula pairs show positive size-assortative pairing with large males pairing with large females and smaller males with

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The Use of the Males' Gnathopods during Precopulation in ...

The Use of the Males

PRECOPULATION IN SOME GAMMARIDEAN AMPHIPODS BY BETTY BOROWSKY Osborn Laboratories of Marine Sciences, Boardwalk at West 8th Street, Brooklyn, New York, 11224, U.S.A. INTRODUCTION The typical pattern of reproductive behavior in epibenthic gammarid amphipods involves a male's carrying a female about for a few days prior to the female's molt.

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Jens Rol• Parasite-mediated sexual selection: parasitized ...

Jens Rol• Parasite-mediated sexual selection: parasitized ...

by female choice for bright and therefore unparasitized ... low-quality infected female mates with any male she can get. This will lead to relatively high frequencies of ... In gammarids, where ...

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