Hatching Process in the Signal Crayfish, Pacifastacus Leniusculus (Dana, 1852) (Decapoda, Astacidae)

Pawlos, Dorota; Korzelecka-Orkisz, Agata; Formicki, Krzysztof; Winnicki, Aleksander

doi:10.1163/001121610x526997

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Various factors have contributed to the visible decline of the native species and to their replacement by the spiny cheek crayfish (Śmietana et al, 2004). The biology of the two native species is very similar, but A. leptodactylus is more tolerant to low oxygen levels and higher water temperatures, enabling it to survive in turbid waters (Skurdal & Taugbøl, 2002;Souty-Grosset et al, 2006;Pawlos et al, 2010). Various strategies have been proposed to protect this species, including survival of juveniles during embryogenesis and hatching.…”

Section: Introductionmentioning

confidence: 99%

Egg Case Ultrastructure in the Narrow-Clawed Crayfish Astacus Leptodactylus Eschscholtz, 1823 (Decapoda, Astacidae)

Pawlos¹,

Formicki

Korzelecka-Orkisz

et al. 2011

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The egg case is an extracellular structure that surrounds an egg cell and the embryo after fertilization. Its basic function is to protect the embryo from potentially harmful aspects of the external environment. Changes in the structure of the egg case at different stages of embryogenesis in the crayfish Astacus leptodactylus were studied, with observations made at the beginning of egg incubation, during incubation, and at the time of hatching. We studied the changes using images taken with transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The egg case is made of three layers that are all close together. The outer layer was 4.59 ± 0.23 μm thick and composed of an electron-dense material; its external structure was rough. The middle layer was the thickest at 8.94±0.29 μm and was slightly folded. It was made of polyhedral grains, interspersed with multiple aeropylar areas and channels. This second (middle) layer consisted of two sublayers of equal thickness but with variable grain size and aeropyle structure. The third and innermost layer was 3.14 ± 0.33 μm thick and made of tightly packed grains, smaller than those in the middle layer. It included a few, small aeropylar channels.

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Section: Introductionmentioning

confidence: 99%

Egg Case Ultrastructure in the Narrow-Clawed Crayfish Astacus Leptodactylus Eschscholtz, 1823 (Decapoda, Astacidae)

Pawlos¹,

Formicki

Korzelecka-Orkisz

et al. 2011

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Transcriptomic characterisation of neuropeptides and their putative cognate G protein-coupled receptors during late embryo and stage-1 juvenile development of the Aotearoa-New Zealand crayfish, Paranephrops zealandicus

Oliphant

Hawkes

Cridge

et al. 2020

General and Comparative Endocrinology

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Physiological performance of native and invasive crayfish species in a changing environment: insights from Dynamic Energy Budget models

Marn

Hudina

Haberle

et al. 2022

Conservation Physiology

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Crayfish are keystone species important for maintaining healthy freshwater ecosystems. Crayfish species native to Europe, such as Astacus astacus and Austropotamobius torrentium, are facing decline and are increasingly endangered by changing climate and invasions of non-native crayfish, such as Pacifastacus leniusculus and Procambarus virginalis. The success of these invasions largely depends on differences in ontogeny between the native species and the invaders and how changes in the environment will affect the ontogeny. Dynamic Energy Budget (DEB) models can be used to investigate such differences because the models capture dependence of metabolism, and therefore ontogeny, on environmental conditions. We develop DEB models for all four species and investigate key elements of ontogeny and metabolism affecting interspecific competition. We then use the DEB models to predict individual growth and reproduction in current and new conditions that are expected to arise from climate change. Although observations suggest that P. leniusculus poses the major threat to native species, our analysis identifies P. virginalis, in spite of its smaller size, as the superior competitor by a large margin—at least when considering metabolism and ontogeny. Our simulations show that climate change is set to increase the competitive edge of P. virginalis even further. Given the prospects of P. virginalis dominance, especially when considering that it is able to withstand and spread at least some crayfish plague strains that severely affect native species, additional research into P. virginalis is necessary.

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Hatching Process in the Signal Crayfish, Pacifastacus Leniusculus (Dana, 1852) (Decapoda, Astacidae)

Cited by 3 publications

References 15 publications

Egg Case Ultrastructure in the Narrow-Clawed Crayfish Astacus Leptodactylus Eschscholtz, 1823 (Decapoda, Astacidae)

Egg Case Ultrastructure in the Narrow-Clawed Crayfish Astacus Leptodactylus Eschscholtz, 1823 (Decapoda, Astacidae)

Transcriptomic characterisation of neuropeptides and their putative cognate G protein-coupled receptors during late embryo and stage-1 juvenile development of the Aotearoa-New Zealand crayfish, Paranephrops zealandicus

Physiological performance of native and invasive crayfish species in a changing environment: insights from Dynamic Energy Budget models

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