tailieunhanh - FEMALE REPRODUCTIVE STRATEGIES OF MARINE FISH SPECIES OF THE NORTH ATLANTIC

This report was written by Peter Hill of the University of Queensland, together with WHO staff members, Dale Huntington and Rebecca Dodd, based on the deliberations of a consultation meeting entitled “Strengthening country office capacity to support sexual and reproductive health in the new aid environment: wrap-up assessment of the 2008–2011 collaborative project”, held in Glion, Switzerland, in March 2011. Comments and suggestions from the following UNFPA and WHO staff are gratefully acknowledged: Juliet Bataringaya, Boureima Diadie, Mamadou Hady Diallo, Mouhamadou Amine Kebe, Juliana Lunguzi, Abdul Bun Hatib N’Jie and Maaike Van Vliet | http J. Northw. Atl. Fish. Sci. Vol. 33 23-31 Female Reproductive Strategies of Marine Fish Species of the North Atlantic H. Murua AZTI Foundation Herrera Kaia - Portualde z g 20 110 Pasaia Basque Country Spain and F. Saborido-Rey Institute of Marine Research Eduardo Cabello 6 36208 Vigo Spain Abstract This contribution describes and identifies the most common reproductive strategies of a large number of commercially important fish species of the North Atlantic with regard to oocyte development ovary organization recruitment of oocytes and spawning pattern. Group-synchronous ovary organization determinate fecundity and batch spawning was the most common suite of associated reproductive traits observed among North Atlantic fishes . gadoids pleuronectoids . Another common type of female reproductive strategy among these species was synchronous determinate and total spawning which occurred in a number of semelparous eels Anguilla sp. capelin Mallotus villosus and iteroparous species . redfishes Sebastes sp. monkfishes Lophius sp. herring Clupea harengus and elasmobranchs . Asynchronous indeterminate and batch spawning occurred among anchovies Engraulis sp. European hake Merluccius merluccius mackerels Scomber sp. and Trachurus sp. swordfish Xiphias gladius and others. Categorization of species according to reproductive strategy assists in the estimation of species-specific fecundity and reproductive potential using various developed protocols. Key -words fecundity life history marine fish North Atlantic ovary oocyte development reproductive strategy spawning pattern Introduction Natural selection leads to the maximization of lifetime production of offspring and more importantly to the maximization of survivorship of offspring until adulthood. The main objective of a reproductive strategy is to maximize reproductively active offspring in relation to available energy and parental life expectancy Wootton 1984 Roff 1992 Pianka 2000 . In order to .

• Sức khỏe phụ nữ
• support and pressures
• government mandates
• Premature and Sick Newborn
• Long Term Effects
• Breastfeeding
• Breastfeeding and Infant Growth
• Nutritional Health
• Feeding and Fluids
• Effectiveness of Assisted
• Reproduction Techniques