Proceedings of the Eurytemora Conference, St. Petersburg, 2019
This monograph is a summary of the conference on Eurytemora, gathering renowned researchers from all over the world to discuss new advances in Phylogeny, Biogeography, Taxonomy, and Ecology of this important group of estuarine crustaceans, held the 13-17 May 2019 in St. Petersburg, Russia. The present volume includes 17 selected papers, in which you will discover new aspects of the modern theory on the history and recent geographical distribution (biogeography) of an important group of estuarine crustaceans, revealing coincidences with a modern model of continental drift. The researchers suggest a new hypothesis on time and place of origin of continental calanoid copepods. The specialists show that studying external morphology in detail helps to increase identification and differentiation between closely related sibling species within the Eurytemora group. Several ecological questions on invasive and pseudocryptic copepod species are debated. Finally, the last chapter of this monography is devoted to taxa related to the Eurytemora group, Epischura, Temora, Temoropia, Pseudodiaptomus.

First published as a Special Issue of Crustaceana 93(3-5): 241-547.
Volume Editors: Wenliang Liu, Xinzheng Li, and Wei Jiang
This volume is devoted to the memory of the eminent carcinologist Professor Ruiyu Liu (1922-2012) of the Institute of Oceanology of Chinese Academy of Sciences, Qingdao, China. Since 1949, Professor Liu has devoted his life to studying taxonomy, systematics, ecology, zoogeography and aquaculture and has published a total of more than 210 papers and monographs. He described two new genera, 52 new species and one new subspecies, including not only crustaceans but also cnidarians, polychaetes and molluscs. In this volume forty of his friends and colleagues put together sixteen papers to honour Professor Liu, and named after him three new genera and eleven new species.
First published as a Special Issue of Crustaceana 93(11-12): 1233-1546.

Abstract

There are three major wild populations of mitten crab (Eriocheir sensu stricto), Suifenhe River (SF), Tumenjiang River (TM) and Liaohe River (LH) in northern China. However, the information on the nutritional quality of these three populations of crabs is still scarce. Thus, we investigated and compared the tissue indices, total edible yield, proximate composition, fatty acid compositions and amino acid contents of these wild crab populations. We showed that: (1) TM population had the highest meat yield among the three populations; (2) TM recorded the highest moisture and the lowest total lipid content in ovary and muscle; (3) a higher level of total n-3 poly-unsaturated fatty acids was found in TM, except for the ovary in SF; (4) the three populations had similar essential amino acids scores. In conclusion, Eriocheir s.s. from these three populations all showed a high nutritional quality suitable for humans, especially the TM, which contains more eicosapentaenoic acid and docosahexaenoic acid.

In: Crustaceana

Abstract

A previous record of the alien crab Callinectes sapidus from the Algerian coasts was based on a photograph provided by a fisherman showing the dorsal side of a single individual. In this contribution, we confirm this presence in the mouth of the Mafragh Estuary in eastern Algeria, where four individuals of this species were found on 19 November 2019. The specimens examined are one female (60 mm CL, 125.9 g) and three males (60-66 mm CL, 120.4-176.8 g). This discovery confirms the presence of this species in the southwestern Mediterranean Basin where it could become invasive in suitable habitats.

In: Crustaceana

Abstract

Burrowing crayfishes have historically lacked life history data due to their elusive nature and difficultly extracting them from burrows. This review provides a synopsis of current literature on burrowing crayfishes’ life histories and a quantitative analysis of published life history content. Only 69 publications covering 94 burrowing species (approx. 39%) met our criteria for a life history study. Many species had only partial life histories documented and two genera (Engaewa and Tenuibranchiurus) had no life history studies available. Size and reproductive season were the most recorded traits across studies while others such as mortality and age/size at molting events were rarely recorded. Reproductive investment, an important predictor of imperilment, was lacking in 87% of burrowing species. Our review emphasizes the need to include life history data with new species descriptions and conduct basic life history studies to effectively assess data-deficient species and protect the future of our threatened burrowing crayfishes.

In: Crustaceana
Author: Kunihiko Izawa

Abstract

Taeniacanthus aulacocephali sp. nov. recovered from Aulacocephalus temminckii Bleeker, 1855 (Serranidae) is described and T. sebastichthydis Yamaguti, 1939 collected from Sebastiscus marmoratus (Cuvier, 1829) and Sebastes inermis Cuvier, 1829 (Sebastidae) is redescribed. The male, copepodid V male, both sexes of copepodid IV, and copepodid II of the latter species are herein described for the first time.

In: Crustaceana

Abstract

The porcellanid crab Lissoporcellana demani Dong & Li, 2014 is reported for the first time from southeast Africa, based on material collected from trawls off Mozambique during the International Indian Ocean Expedition in 1963-1964. Lissoporcellana demani has been known only from the western Pacific, and the present specimens greatly extend the previously known distribution range of this species to the western Indian Ocean. Illustrations of a specimen are provided. Morphological variations of L. demani and characters distinguishing it from closely related congeneric species are discussed.

In: Crustaceana

Abstract

A new calanoid copepod, Sursamucro rostratus sp. nov., belonging to the family Aetideidae, is described from female specimens collected in the northern Pacific and South Atlantic from abyssal waters close to the sea bed. The new species is the second of a rare deep-water genus, Sursamucro; it differs from its congener in size, configuration of the rostrum, the shape of the posterior corners of the prosome and details of antenna, mandible, maxillule and P1 setation. The genus Sursamucro is recorded for the first time from the northern Pacific and the Atlantic Ocean.

In: Crustaceana

Abstract

The insulin signalling pathway is one of the most studied pathways, including ovary maturation and female reproduction. However, downstream elements involved in this cascade remain unknown. Here, we identified and characterized an insulin-like receptor (IR) in female Macrobrachium rosenbergii, and named as Mro-IR. The deduced Mro-IR contained conserved domains of IR proteins, including two ligand-binding domains, a furin-like domain, two fibronectin-3 domains, a transmembrane domain and an intracellular tyrosine kinase domain in order. Multiple sequence alignment of the first ligand-binding domain and the tyrosine kinase domain in Mro-IR revealed a high degree of similarity to other representative IRs. Mro-IR was clustered into a separate branch with IRs from decapods by phylogenetic analysis. Additionally, tissue distribution analysis showed that Mro-IR was uniquely expressed in the ovary of M. rosenbergii. This study would possibly provide a new highlight to the molecular mechanism of insulin-like signalling cascade, regulating female sexual differentiation in crustaceans.

In: Crustaceana