Golden Shiner Egg Production during a Spawning Season

2010 ◽  
Vol 72 (3) ◽  
pp. 272-277 ◽  
Author(s):  
Troy Clemment ◽  
Nathan Stone
Keyword(s):  
Egg Production ◽  
Spawning Season ◽  
Golden Shiner

Multiple spawning and the dynamics of fish populations: inferences from an individual-based simulation model

1998 ◽  
Vol 55 (10) ◽  
pp. 2244-2254 ◽  
Author(s):  
Susan K Lowerre-Barbieri ◽  
James M Lowerre ◽  
Luiz R Barbieri
Keyword(s):  
Simulation Model ◽  
Egg Production ◽  
Adult Population ◽  
Individual Variability ◽  
Spawning Season ◽  
Average Life Span ◽  
Multiple Spawning ◽  
Individual Based Simulation ◽  
First Maturity ◽  
Size At Age

We used an individual-based Monte Carlo simulation model to assess how aspects associated with multiple spawning (within a spawning season) affected survivorship, lifetime fecundity, cohort egg production, and yield-per-recruit of a highly exploited species. To make our model more realistic, we included and tested the effects of individual variability in growth and a seasonal growth pattern. Birth months influenced when fish first matured and became vulnerable to the fishery. There was a sixfold increase in mature fish at the beginning of their first spawning season associated with having been born early versus late the previous season. Early born fish had a lower average life-span than later born fish. Although early born fish had lower survivorship they produced the most eggs because of an early size at first maturity, low fishing mortality in the first year, and their larger size at age. These results suggest multiple spawning can have important implications for recruitment and adult population dynamics.

scholarly journals Wild and farmed burbot Lota lota: differences in energy consumption and behavior during the spawning season

2021 ◽  
Vol 13 ◽  
pp. 51-63
Author(s):  
O Slavík ◽  
P Horký
Keyword(s):  
Spatial Distribution ◽  
Energy Consumption ◽  
Egg Production ◽  
Spawning Season ◽  
Movement Activity ◽  
Farmed Fish ◽  
In The Wild ◽  
Spawning Behaviour ◽  
And Behavior ◽  
Wild Group

Farmed fish released in a native environment can display different spawning behaviour compared to their wild conspecifics. In our study, farmed and wild burbot, a species recently introduced for aquacultural production, were equipped with electromyogram (EMG) radio tags. EMG biotelemetry allows a description of the spatial distribution of fish together with simultaneous measurements of individual energy consumption. Farmed burbot were released into the wild to simulate stocking or hatchery escape and were observed over a nocturnal phase during November to January. The observational period was assumed to cover the whole spawning season, including an expected peak of spawning activity determined according to egg production by naturally spawning burbot in an experimental seminatural river channel. We detected increased energy consumption and lower movement activity at the time of expected peak spawning for wild burbot only. Across the whole spawning season, farmed females showed lower movement activity and energy consumption than wild females, whereas the opposite results were found for farmed males. Farmed and wild fish kept larger distances between each other than the individuals within a group (farmed and wild) across the whole spawning season. The closest positions occurred between males and females in the wild group, while for farmed fish, the closest position was found within the same sex. Sexually conditioned energy consumption and spatial distribution differed between wild and farmed fish.

Spawning season, spawning grounds, and egg production of red sea bream in Hiuchi-nada, Seto Inland Sea

2008 ◽  
Vol 75 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Hiromu Zenitani ◽  
Yousuke Onishi ◽  
Shiho Kobayashi ◽  
Tateki Fujiwara
Keyword(s):  
Red Sea ◽  
Egg Production ◽  
Spawning Season ◽  
Seto Inland Sea ◽  
Sea Bream ◽  
Red Sea Bream ◽  
Spawning Grounds

Growth and reproductive rates of Littorina neritoides (L.) in North Wales

1980 ◽  
Vol 60 (3) ◽  
pp. 591-599 ◽  
Author(s):  
Roger N. Hughes ◽  
Derek J. Roberts
Keyword(s):  
Growth Rates ◽  
Egg Production ◽  
Feeding Activity ◽  
Shell Height ◽  
Growth Parameter ◽  
Spawning Season ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Asymptotic Size ◽  
Growth Increments

Growth rates in shell height on the shore and the number of eggs released in the laboratory during the spawning season were extremely variable among Littorina neritoides from a population on Anglesey, N. Wales. Much of this variability was attributed to the effects of unpredictable weather conditions on feeding activity. Thirtyper cent of the individually tagged snails in the population did not grow during 1976–8. Growth increments of the remaining snails were used to estimate the growth parameter, k, of the von Bertalanffy growth equation, and the asymptotic size, h∞, used in the equation was estimated to be 7·5 mm, corresponding to the largest individual found in the population. The von Bertalanffy equation was then used to construct a growth schedule for L. neritoides from post-settlement to the attainment of the asymptotic size. From this schedule, snails were expected to take at least 9 months to grow to a shell height of 2 mm and at least 5 years to grow to 7 mm. This growth schedule agrees closely with growth rates observed by Lysaght (1941) in a population at Plymouth, but predicts much lower growth rates than those estimated by Daguzan (1976) for a population in Brittany. Eggs were released from March to June in 1977 and from January to June in 1978. The extreme individual variability in egg production largely obscured the underlying relationship between fecundity and body size. The maximum observed fecundity was for a 71 mm snail which released a total of 3866 eggs during the 1978 spawning season. The average fecundity was 22 eggs per day during the 1978 spawning season, or about 300 eggs per season.

Reproductive biology of blue mackerel, Scomber australasicus, off southern and eastern Australia: suitability of the Daily Egg Production Method for stock assessment

2009 ◽  
Vol 60 (2) ◽  
pp. 187 ◽  
Author(s):  
P. J. Rogers ◽  
T. M. Ward ◽  
L. J. McLeay ◽  
M. Lowry ◽  
R. J. Saunders ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Egg Production ◽  
Stock Assessment ◽  
Fork Length ◽  
Production Method ◽  
Spawning Season ◽  
Batch Size ◽  
Batch Fecundity ◽  
Eastern Australia ◽  
Mature Fish

The present study investigated the reproductive biology of blue mackerel (Scomber australasicus) off southern and eastern Australia and assessed the suitability of the Daily Egg Production Method (DEPM) for future stock assessment. This analysis revealed that S. australasicus is a serial spawner with asynchronous oocyte development and indeterminate fecundity. S. australasicus spawns between November and April off southern Australia and between July and October off eastern Australia. In southern Australia, ~50% of males and females were mature at 236.5 and 286.8 mm fork length (FL), respectively. Size at ~50% maturity could not be estimated reliably for eastern Australia owing to the smaller proportion of mature fish in samples. Mean spawning frequencies ranged from 2 to 11 days off southern Australia. Batch fecundity was related to fish size and mean batch size was 69 894 ± 4361 oocytes per batch and 134 oocytes per g of weight. The timing and duration of the spawning season, size at maturity, spawning frequency and batch fecundity of S. australasicus off southern Australia were consistent with those of S. japonicus in the northern Pacific Ocean. The present study’s estimates of adult reproductive parameters of S. australasicus off southern Australia were suitable for the application of the DEPM for estimating spawning biomass. Collecting representative samples of mature fish from waters off eastern Australia during the spawning season is a high priority for future stock assessment of this species.

scholarly journals Laboratory rearing of walleye pollock Gadus chalcogrammus from egg to first-time spawning season, and egg production and egg size in relation to ration level

2019 ◽  
Vol 85 (3) ◽  
pp. 321-330 ◽  
Author(s):  
TORU NAKAGAWA ◽  
HIROSHIGE TANAKA ◽  
MASAYUKI CHIMURA ◽  
YUUHO YAMASHITA ◽  
TAKASHI YOKOTA
Keyword(s):  
Egg Production ◽  
Egg Size ◽  
Walleye Pollock ◽  
Spawning Season ◽  
Laboratory Rearing ◽  
Ration Level ◽  
First Time

Batch or trickle: understanding the multiple spawning strategy of southern calamary, Sepioteuthis australis (Mollusca : Cephalopoda)

2008 ◽  
Vol 59 (11) ◽  
pp. 987 ◽  
Author(s):  
Matthew R. Kuipers ◽  
Gretta T. Pecl ◽  
Natalie A. Moltschaniwskyj
Keyword(s):  
Egg Production ◽  
Reproductive Effort ◽  
Developmental Stages ◽  
Spawning Season ◽  
The Other ◽  
Lifetime Fecundity ◽  
Multiple Spawning ◽  
Maturation Stages ◽  
Oocyte Stage ◽  
Batch Spawning

Many cephalopods are ‘multiple spawners’; however, we know little about the timing and dynamics of egg production. This has implications for the allocation of energy to reproduction, lifetime fecundity and subsequent recruitment. The current study aimed to determine if Sepioteuthis australis (Quoy and Gaimard, 1832), which spawns multiple times, produces mature oocytes for deposition in a continuous trickle or in larger discrete batches. Throughout a spawning season, developmental stages were assigned to the ovaries of each female by combining macroscopic and histological analyses of the oocytes. Half of the females (46%) showed a significant peak in oocytes at one of the maturation stages, indicating that females were developing eggs in batches. It was hypothesised that the remaining females were also batch spawning, given that the oviduct weights of the remaining females (54%) were high and the other measured biological characteristics were similar to those of the females showing a peak in oocyte stage. Average batch fecundity declined over the 3-month spawning season, but total egg numbers in the ovary increased, suggesting that females might have deposited small batches more often during December. As reproduction requires large allocations of energy, understanding how females distribute reproductive effort throughout their lives is crucial to understanding the behaviour of populations, individuals and their offspring.

scholarly journals Fecundity regulation in horse mackerel

2013 ◽  
Vol 71 (3) ◽  
pp. 546-558 ◽  
Author(s):  
Cindy J. G. van Damme ◽  
Anders Thorsen ◽  
Merete Fonn ◽  
Paula Alvarez ◽  
Dolores Garabana ◽  
...  
Keyword(s):  
Lipid Content ◽  
Egg Production ◽  
Gonadosomatic Index ◽  
Production Method ◽  
Spawning Season ◽  
Horse Mackerel ◽  
Hepatosomatic Index ◽  
Batch Fecundity ◽  
Production Methods ◽  
Unbiased Estimates

Abstract Egg production methods have been used successfully in the provision of advice for fisheries management. These methods need accurate and unbiased estimates of fecundity. We explore the reproductive strategy of horse mackerel and estimation of fecundity. Fecundity and fecundity regulation in relation to condition was investigated over a number of years. Fulton's K, lipid content, and hepatosomatic index increased after the start of spawning, though decreased again at the end of spawning. The increase in the gonadosomatic index, fecundity, and body condition after the onset of spawning suggests that horse mackerel utilizes food resources during the spawning season and might be an income breeder. However, the decline in K and lipid before the spawning season suggests that the first batch of oocytes is developed on stored energy. Fecundity varied between years and within a spawning season. Over latitude, variations in fecundity were small. K and lipid content are not reliable indices as proxy for fecundity. Batch fecundity appears to be heterogeneous across the spawning season but homogeneous across latitude. The homogeneity of batch fecundity over latitude could indicate that the daily egg production method is an appropriate approach for estimating the abundance of a wide ranging species, as horse mackerel.

Volume and Lipid, Fatty Acid, and Amino Acid Composition of Golden Shiner Eggs during a Spawning Season

2007 ◽  
Vol 69 (2) ◽  
pp. 116-126 ◽  
Author(s):  
S. E. Lochmann ◽  
K. J. Goodwin ◽  
R. T. Lochmann ◽  
N. M. Stone ◽  
T. Clemment
Keyword(s):  
Fatty Acid ◽  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Spawning Season ◽  
Lipid Fatty Acid ◽  
Golden Shiner
Sign in / Sign up

Export Citation Format

Share Document