Study on the Adaptability Status and Reproductive Success of <I>Oreochromis niloticus</I> L. (Pisces: Cichlidae) and Carp (<I>Cyprinus carpio</I> L., 1758) in a Tropic Reservoir (Fincha, Ethiopia)
Bibliographic record
Abstract
The adaptability status and reproductive success of the introduced fish Nile Tilapia ( Oreochromis niloticus L.) and common carp ( Cyprinus carpio L., 1758) in Fincha reservoir, Ethiopia were studied on monthly basis from July 2006 to August 2007. Gill nets of different mesh size (60 mm, 80 mm, 100 mm, 120 mm and 140 mm, stretched mesh size) and beich sein (50 m long) were used to harvest the fish (a total of 645 fishes). Total length (L) and body weight (W) of both species were measured to the nearest 0.1 cm and 1g respectively. The results of the study showed that both fish species are adapted and have established successful breeding population in the reservoir. The size at first sexual maturity (L 50 ) for Oreochromis niloticus in Fincha reservoir was 21.8 cm for female and 24.5 cm for the male while L 50 was 37.5cm and 24.5cm for female and male Cyprinus carpio respectively. It was found that Oreochromis niloticus breeds throughout the year showing a peak breeding season in January and July in Fincha reservoir while Cyprinus carpio showed a peak breeding season between March and June. The length-weight relationships, total length (L) in cm; total weight (W) in g were calculated for O. niloticus (W=0.8×10 -2 L 3.20 ; n=87; r 2 = 0.96) and C. carpio (W=1.4×10 -2 L 2.97 ; n=558; r 2 =0.99) and showed a curvilinear relationship signifying the fish grow nearly isometrically. A significant seasonal variation (ANOVA, P 0.05). Apparently, length frequency distribution of both species indicated that the fish population is normal fish population with no apparent problems of over exploitation.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".