Reproductive timing by the polychaetes Clymenella torquata and Praxillella praetermissa in Passamaquoddy Bay, New Brunswick

1975 ◽  
Vol 53 (3) ◽  
pp. 293-296 ◽  
Author(s):  
V. Leslie Rowe ◽  
H. B. N. Hynes ◽  
A. V. Tyler
Keyword(s):  
New Brunswick ◽  
Reproductive Biology ◽  
Numerical Stability ◽  
Food Item ◽  
Reproductive Timing ◽  
The South ◽  
Arctic Species ◽  
Passamaquoddy Bay

Two species of polychaete, Clymenella torquata and Praxillella praetermissa, are able to maintain sufficient numerical stability to be a regular food item of fish in Passamaquoddy Bay, New Brunswick. Each species is living near an extreme of its distribution in Passamaquoddy Bay and this has necessitated adaptations in habitat and in reproductive biology. Clymenella spawn at the same temperature as do populations to the south but later in the summer. Praxillella, an Arctic species, spawns during winter.

Herring Fishery in Southern New Brunswick

1960 ◽  
Vol 17 (2) ◽  
pp. 133-168
Author(s):  
R. A. McKenzie ◽  
S. N. Tibbo
Keyword(s):  
New Brunswick ◽  
Tidal Power ◽  
Annual Variations ◽  
Significant Relationships ◽  
Passamaquoddy Bay

Most of the herring taken in the Passamaquoddy area of southern New Brunswick are caught in stationary weirs built close to shore. Analyses of weir catches show no significant relationships between average catches inside Passamaquoddy Bay and catches in outside areas for the same year. Weirs inside Passamaquoddy Bay are more efficient and catch about twice as many herring per weir as those outside the Bay.Seasonal and annual variations both in individual weir catches and in total catches in the various statistical districts of Charlotte County are far greater now than any changes that can be forecast as resulting from the installation of the proposed Passamaquoddy tidal power dams.

First report on the diet and reproductive biology of red-toothed triggerfish Odonus niger (Ruppell, 1836) from the south-eastern Arabian Sea

2021 ◽  
pp. 1-11
Author(s):  
Nitin Kanji Suyani ◽  
Mridula Rajesh ◽  
Kothanahally Mallegowda Rajesh
Keyword(s):  
Reproductive Biology ◽  
Arabian Sea ◽  
Feeding Habits ◽  
Gonadosomatic Index ◽  
Biological Information ◽  
The South ◽  
Spawning Period ◽  
South Eastern ◽  
Eastern Arabian Sea ◽  
Males And Females

Abstract The feeding habits and reproductive biology of red-toothed triggerfish Odonus niger (Ruppell, 1836) was analysed from 449 specimens collected from the Karnataka coast of the south-eastern Arabian Sea. Of the total stomachs examined, only 54 (12%) were empty and 395 contained food remains. The diet comprised crustacean remains (48.0%), zooplankton (21.4%), algae (16.5%), fish remains (6.1%) and cephalopod remains (5.3%) along with partially digested matter (2.3%) and detritus (0.4%). The species was found to be a generalist feeder and an omnivore. The overall sex ratio between males and females (1: 0.44) was significantly (P < 0.05) different. Histological examination of the ovaries indicated asynchronous ovarian development in females, with males maturing earlier than females. The gonadosomatic index (GSI) patterns of males and females, and the presence of ripe ovaries and spermatozoids suggested that April–May is the peak spawning period. The absolute and relative fecundity estimates ranged from 16,464–312,420 eggs and 251–2812 eggs g−1 respectively. Fecundity was positively correlated with total length and body weight. The biological information on diet composition and reproductive traits provided for the first time in this study can facilitate conservation, management and sustainable exploitation of this species in the study area.

scholarly journals Diet of some passerines in south coast of Espírito Santo State, Brazil

2017 ◽  
Vol 57 (29) ◽  
pp. 387 ◽  
Author(s):  
Ursola Sabino ◽  
Rodrigo Morais ◽  
Charles Duca
Keyword(s):  
Atlantic Forest ◽  
Food Item ◽  
South Coast ◽  
Trophic Guilds ◽  
The South ◽  
Espírito Santo ◽  
Terrestrial Arthropods ◽  
Espirito Santo ◽  
Tartar Emetic

Studies about diet of birds in Atlantic Forest are scarce. In this study, we characterized the diet of Passeriformes from the south coast of Espírito Santo State, Brazil, classifying them into trophic guilds. From 26 species a total of 94 samples were obtained by regurgitation using tartar emetic method. The 855 items found were separated into two different categories: Insects (includes other terrestrial arthropods, such as spiders and opiliones) and Fruits/Seeds. The most frequent food item was Coleopterans, and the most abundant was Hymenoptera.

Life history of Mysis stenolepis Smith (Crustacea, Mysidacea)

1975 ◽  
Vol 53 (7) ◽  
pp. 942-952 ◽  
Author(s):  
T. Amaratunga ◽  
S. Corey
Keyword(s):  
Young Adults ◽  
Life History ◽  
New Brunswick ◽  
Shallow Water ◽  
Field Study ◽  
Sexual Maturity ◽  
Developmental Stages ◽  
Shallow Waters ◽  
Passamaquoddy Bay ◽  
History Of

A 17-month field study showed that Mysis stenolepis in Passamaquoddy Bay, New Brunswick lives for about 1 year. Young are released in shallow water early in spring and grow rapidly during the summer. In the fall, young adults migrate to deeper water where they reach sexual maturity. Transfer of sperm lakes place during winter in deeper regions of the Bay. soon after which the males die. Females survive and in spring migrate to shallow waters to release young after which they die. Females breed once and carry an average of 157 young per brood. Developmental stages of the postmarsupial young are described and discussed.

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