scholarly journals Monoamine content during the reproductive cycle of Perna perna depends on site of origin on the Atlantic Coast of Morocco

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Mounia S. Klouche ◽  
Philippe De Deurwaerdère ◽  
Françoise Dellu-Hagedorn ◽  
Nouria Lakhdar-Ghazal ◽  
Soumaya Benomar
Keyword(s):  
Reproductive Cycle ◽  
Atlantic Coast ◽  
Perna Perna ◽  
Monoamine Content

scholarly journals First record of the brown mussel (Perna perna) from the European Atlantic coast

2012 ◽  
Vol 5 ◽  
Author(s):  
Carla R. Lourenço ◽  
Katy R. Nicastro ◽  
Ester A. Serrão ◽  
Gerardo I. Zardi
Keyword(s):  
Atlantic Coast ◽  
First Record ◽  
Perna Perna ◽  
Brown Mussel

scholarly journals Depth and Seasonal Effects on the Settlement Density of Two Mussel Species (Perna Perna and Mytilus Galloprovincialis) in Offshore, Agadir (Morocco)

2018 ◽  
Vol 14 (12) ◽  
pp. 229 ◽  
Author(s):  
Mohamed Id Halla ◽  
Jawad Kassila ◽  
El Mustafa Ait Chattou ◽  
Yassine Ouaggajou ◽  
Fatima El Aamri ◽  
...  
Keyword(s):  
Mytilus Galloprovincialis ◽  
Sea Water ◽  
Atlantic Coast ◽  
Seasonal Effects ◽  
Homogeneous Distribution ◽  
Limiting Factor ◽  
Perna Perna ◽  
Mussel Species ◽  
The North ◽  
Spat Settlement

A study of spat settlement of two mussel species was carried out in Agadir area on the North Atlantic Coast, between Jan 2002 and Jan 2003. The preferred depth of settlement and settlement period of both species were monitored on collectors suspended in offshore at three different depths (1, 5, 10 m). For Perna perna, the effect of season on settlement was consistent, with relatively higher settlement both in spring (286-462 spats.m-1 ) and in summer (406-594 spats.m-1 ). Similar abundances of settlers were found at 1 m and 5 m depth whatever the season, which suggests a homogeneous distribution of settlers of P. perna in the first 5 m of the sea water. For Mytilus galloprovincialis, the settlement was less patchy in time in regard to P. perna (ρ<0.05). Thus, the settlement was continuous from spring to autumn until 10 m depth. The filamentous structures (laces in polypropylene) used in this study are often designed to enhance the amount of settlers, however, the settlement densities of both species were very low. Consequently, the results suggest that larval supply has been the limiting factor in the settlement success, but not the lack of suitable substrates. Moreover, the study area has poor spat falls and seems to be not suitable for collection of mussel spat.

Elevated nest predation risk promotes offspring size variation in birds with prolonged parental care.

2019 ◽  
Author(s):  
Gretchen F. Wagner ◽  
Emeline Mourocq ◽  
Michael Griesser
Keyword(s):  
Predation Risk ◽  
Reproductive Cycle ◽  
Perceived Risk ◽  
Nest Predation ◽  
Bird Species ◽  
Size Variation ◽  
Egg Laying ◽  
Offspring Size ◽  
Natural Predation ◽  
Risk Spreading

Predation of offspring is the main cause of reproductive failure in many species, and the mere fear of offspring predation shapes reproductive strategies. Yet, natural predation risk is ubiquitously variable and can be unpredictable. Consequently, the perceived prospect of predation early in a reproductive cycle may not reflect the actual risk to ensuing offspring. An increased variance in investment across offspring has been linked to breeding in unpredictable environments in several taxa, but has so far been overlooked as a maternal response to temporal variation in predation risk. Here, we experimentally increased the perceived risk of nest predation prior to egg-laying in seven bird species. Species with prolonged parent-offspring associations increased their intra-brood variation in egg, and subsequently offspring, size. High risk to offspring early in a reproductive cycle can favour a risk-spreading strategy particularly in species with the greatest opportunity to even out offspring quality after fledging.

Invasion by the marine gastropod Ocinebrellus inornatus in France. II. Expansion along the Atlantic coast

2004 ◽  
Vol 273 ◽  
pp. 163-172 ◽  
Author(s):  
C Martel ◽  
F Viard ◽  
D Bourguet ◽  
P Garcia-Meunier
Keyword(s):  
Atlantic Coast ◽  
Marine Gastropod

Mechanisms underlying pituitary microvascular remodelling in thoroughbred horses during the annual reproductive cycle

2014 ◽  
Author(s):  
Angus Yeomans ◽  
Nichol Thompson ◽  
Jennifer Castle-Miller ◽  
David O Bates ◽  
Domingo Tortonese
Keyword(s):  
Reproductive Cycle ◽  
Annual Reproductive Cycle ◽  
Thoroughbred Horses
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