First results of embryonic development, spawning and larval rearing of the Mediterranean spider crabMaja squinado(Herbst ) under laboratory conditions, a candidate species for a restocking program

2011 ◽  
Vol 43 (12) ◽  
pp. 1777-1786 ◽  
Author(s):  
Juana Durán ◽  
Elena Pastor ◽  
Amalia Grau ◽  
José María Valencia
2007 ◽  
Vol 16 (1) ◽  
pp. 69-84 ◽  
Author(s):  
Marcelino Herrera ◽  
Ismael Hachero ◽  
Montserrat Rosano ◽  
José Francisco Ferrer ◽  
José Manuel Márquez ◽  
...  

Zygote ◽  
2021 ◽  
pp. 1-5
Author(s):  
Raquel Santos dos Santos ◽  
Jeane Rodrigues Rodrigues ◽  
Jhennifer Gomes Cordeiro ◽  
Hadda Tercya ◽  
Marissol Leite ◽  
...  

Summary This study describes the embryonic development of Moenkhausia oligolepis in laboratory conditions. After fertilization, the embryos were collected every 10 min up to 2 h, then every 20 min up to 4 h, and afterwards every 30 min until hatching. The fertilized eggs of M. oligolepis measured approximately 0.85 ± 0.5 mm and had an adhesive surface. Embryonic development lasted 14 h at 25ºC through the zygote, cleavage, blastula, gastrula, neurula, and segmentation phases. Hatching occurred in embryos around the 30-somites stage. The present results contribute only the second description of embryonic development to a species from the Moenkhausia genus, being also the first for this species. Such data are of paramount importance considering the current conflicting state of this genus phylogenetic classification and may help taxonomic studies. Understanding the biology of a species that is easily managed in laboratory conditions and has an ornamental appeal may assist studies in its reproduction to both supply the aquarium market and help the species conservation in nature. Moreover, these data enable the use of M. oligolepis as a model species in biotechnological applications, such as the germ cell transplantation approach.


Author(s):  
Annetrudi Kress

While working on taxonomic problems in the family Dotoidae and comparing the Mediterranean and Atlantic species (Schmekel & Kress, in the Press), it became apparent that very little embryological information was available for this group, other than that published by Alder & Hancock (1845–55), Pelseneer (1911), Miller (1958, Ph.D. Thesis, University of Liverpool) and Thompson (1967).In the course of studies on the changes in egg-capsule volume in different nudibranch species (Kress, 1971, 1972) a fresh attempt has been made to obtain some comparative data on egg and capsule sizes and on the course and rate of embryonic development in the three species of Doto most commonly found in the Plymouth area, namely D. coronata (Gmelin, 1791), D. pinnatifida (Montagu, 1804) and D. fragilis (Forbes, 1838).


2007 ◽  
Vol 65 (1-4) ◽  
pp. 190-211 ◽  
Author(s):  
Ananda Pascual ◽  
Marie-Isabelle Pujol ◽  
Gilles Larnicol ◽  
Pierre-Yves Le Traon ◽  
Marie-Hélène Rio

1999 ◽  
Vol 54 (2) ◽  
pp. 105-112 ◽  
Author(s):  
L. Chabason

Abstract. The history ofthe relationship between man and nature, since time immemorial, sets the scene for studying issues related to sustainable development. Concepts of «carrying capacity» and «ecological impact» are not new, as is illustrated by the example of the use of water resources in Ancient Greece. The Mediterranean region is particularly sensitive to such problems, and the protection of the Mediterranean sea was one of the first results to emerge from the Stockholm Conference in 1972. The United Nations Environment Programme (UNEP), born after the Conference, gave birth to the Mediterranean Action Plan, leading to the Barcelona Convention linking together twenty coastal states, as well as the European Union. In this framework, the Blue Plan was set up and designed to study the impacts on the environment of development and population growth. Several possible scenarios were set up, providing background material for the Earth Summit in Rio. The period between 1990 – 1995 saw the newly set up Mediterranean Commission dealing with issues relating to water (management, pollution), tourism (colonisation of natural sites, pressure on the environment) and sustainable management of coastal regions. Other points were also raised recently, such as sustainable urban development. However, this institutionalisation of environmental problems that happen at both the national and international levels, should not lead to a compromise Statement achieving nothing concrete. Indeed, the maintenance of environmental achievements and the definition of new concepts should allow sustainable development to move forward.


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