An examination of the feasibility of passive transport from coastal spawning grounds to estuarine nursery areas for English sole

2006 ◽  
Vol 68 (3-4) ◽  
pp. 609-618 ◽  
Author(s):  
Christopher N. Rooper ◽  
Donald R. Gunderson ◽  
Barbara M. Hickey
Keyword(s):  
English Sole ◽  
Passive Transport ◽  
Spawning Grounds ◽  
Nursery Areas

Maturation and Spawning of Atlantic Herring (Clupea harengus harengus) in the Southern Gulf of St. Lawrence

1975 ◽  
Vol 32 (1) ◽  
pp. 66-68 ◽  
Author(s):  
S. N. Messieh
Keyword(s):  
Clupea Harengus ◽  
Atlantic Herring ◽  
Spawning Grounds ◽  
Nursery Areas ◽  
Maturity Stages ◽  
Clupea Harengus Harengus

Analysis of maturity stages of herring samples taken from the southern Gulf of St. Lawrence shows two maturation cycles for spring and autumn spawning herring. The spring population has a spawning peak in May and the summer–autumn population extends spawning from July through September. Spawning grounds of spring and autumn herring populations and their nursery areas are mapped.

Vertical migration of postlarval penaeid prawns in two Australian estuaries: the effect of tide and day/night

2008 ◽  
Vol 59 (8) ◽  
pp. 671 ◽  
Author(s):  
D. J. Vance ◽  
R. C. Pendrey
Keyword(s):  
Water Column ◽  
Vertical Migration ◽  
Hydrodynamic Models ◽  
Water Turbidity ◽  
Spawning Grounds ◽  
Migration Patterns ◽  
Nursery Areas ◽  
Net Migration ◽  
Penaeus Semisulcatus ◽  
The Vertical Distribution

Knowledge of the vertical migration behaviour of postlarval penaeid prawns is important in understanding postlarval migration from offshore spawning grounds to estuarine nursery areas. We sampled throughout several 24-h periods in two estuaries in Australia to assess the distribution of postlarvae in the water column. We used four trawl nets: one net in the top 0.5 m of the water column and three nets one above the other, from the seabed to 0.72 m above the seabed. Penaeus plebejus was abundant in catches in the Nerang River, southern Queensland, while Penaeus semisulcatus, Penaeus esculentus and Penaeus merguiensis were caught in the Embley River, northern Queensland. For all species, the highest catches at the surface were on night flood tides. Many postlarvae in the Embley River were caught in nets above the seabed on ebb tides, suggesting that net migration patterns cannot be determined simply by sampling surface waters. The vertical distribution of penaeid postlarvae is determined primarily by tide and day/night; however, water turbidity and cloud cover, factors that reduce light at the seabed, are also likely to be important. All these aspects of postlarval behaviour should be included in hydrodynamic models of larval advection from spawning grounds to inshore nursery areas.

Seasonal changes in gonad maturity, and abundance of larvae and early juveniles of barramundi, Lates calcarifer (Bloch), in Van Diemen Gulf and the Gulf of Carpentaria

1985 ◽  
Vol 36 (2) ◽  
pp. 177 ◽  
Author(s):  
TLO Davis
Keyword(s):  
Breeding Season ◽  
Summer Monsoon ◽  
Seasonal Changes ◽  
Lates Calcarifer ◽  
Spawning Grounds ◽  
Gonad Maturity ◽  
Nursery Areas ◽  
Total Length ◽  
Tidal Pools ◽  
River Mouths

L. calcarifer undergoes a prolonged breeding season that starts just before the summer monsoon. In Van Diemen Gulf the fish spawned in 1978-1979 from September to February, and in the Gulf of Carpentaria in 1979-1980 from November to March. Spawning was localized, occurring near river mouths on coastal mudflats or upstream in rivers where salinities were relatively high (30). There was no evidence for coastal migrations to specific spawning grounds. Juveniles from 9 mm total length entered, on the high spring tides, supralittoral habitats such as tidal pools, gutters, swamps and low- lying inundated coastal floodplain for use as nursery areas.

Using a biophysical model to investigate connectivity between spawning grounds and nursery areas of King George whiting ( Sillaginodes punctatus : Perciformes) in South Australia’s gulfs

2020 ◽  
Vol 30 (1) ◽  
pp. 51-68
Author(s):  
Troy A. Rogers ◽  
Ana Redondo Rodriguez ◽  
Anthony J. Fowler ◽  
Mark J. Doubell ◽  
Michael J. Drew ◽  
...  
Keyword(s):  
Biophysical Model ◽  
Spawning Grounds ◽  
Nursery Areas

Observations on the Migration of Sockeye Salmon Fry (Oncorhynchus nerka) in the Lower Babine River

1972 ◽  
Vol 29 (2) ◽  
pp. 151-159 ◽  
Author(s):  
W. Craig Clarke ◽  
H. D. Smith
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Behavioral Characteristics ◽  
Behavioral Differences ◽  
Spawning Grounds ◽  
Nursery Areas ◽  
Salmon Fry

No distinct length, weight, or behavioral differences associated with place of capture in the river were observed, indicating that all fry are susceptible to downstream displacement. A minimum of 7.5 million (18%) of the fry produced passed through a counting fence below the spawning grounds. Others reached quiet waters inshore, where they progressively developed behavioral characteristics that enabled them to ascend the river and reach lake nursery areas above. Two million fry ascended an improvised ladder spanning an area of turbulence at the base of the fence. Construction of leads and baffles at strategic places below the fence could help fry reach shore sooner and increase numbers reaching the lake.

On the structural organization of biological pumps and channels

1984 ◽  
Vol 42 ◽  
pp. 138-141
Author(s):  
G. Zampighi ◽  
M. Kreman
Keyword(s):  
Active Transport ◽  
Transport System ◽  
Plasma Membranes ◽  
Transport Proteins ◽  
Molecular Organization ◽  
Passive Transport ◽  
Concentration Gradients ◽  
Cell Functions ◽  
Natural Concentration ◽  
Active Transport System

The plasma membranes of most animal cells contain transport proteins which function to provide passageways for the transported species across essentially impermeable lipid bilayers. The channel is a passive transport system which allows the movement of ions and low molecular weight molecules along their concentration gradients. The pump is an active transport system and can translocate cations against their natural concentration gradients. The actions and interplay of these two kinds of transport proteins control crucial cell functions such as active transport, excitability and cell communication. In this paper, we will describe and compare several features of the molecular organization of pumps and channels. As an example of an active transport system, we will discuss the structure of the sodium and potassium ion-activated triphosphatase [(Na+ +K+)-ATPase] and as an example of a passive transport system, the communicating channel of gap junctions and lens junctions.

Coastal marine and in-river migration behaviour of adult sockeye salmon en route to spawning grounds

2014 ◽  
Vol 496 ◽  
pp. 71-84 ◽  
Author(s):  
SM Wilson ◽  
SG Hinch ◽  
SM Drenner ◽  
EG Martins ◽  
NB Furey ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Spawning Grounds ◽  
Migration Behaviour ◽  
Coastal Marine ◽  
River Migration
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