Potential collapse of North Sea cod stocks

Article Abstract:

The populations of North Sea cod have declined significantly due to unsustainable harvesting or overfishing which depletes the number of mature fishes that are capable of spawning. Analysis of North Sea cod populations based on the stock-recruitment curve shows the detrimental effects of cod harvesting beyond the maximum sustainable yield. Furthermore, overfishing also reduced the chances of juvenile Atlantic cod to reach maturity and reproduce to rejuvenate the cod stock.

Fish populations, North Sea, Fish population declines, Spawning

---

Distant gene flow in tropical trees

Article Abstract:

The use of simple sequence repeats (SSR) for determining gene flow and mating parameters in 28 adult trees of the species Pithecellobium elegans is demonstrated. The results reveal a substantial degree of pollen competition in outcrossing species. A paternal genotyope for all mating events was identified and it was shown that gene flow from known fathers averaged 142 meters.

Genetic aspects, Trees, Trees (Plants)

---

Population of origin of Atlantic cod

Article Abstract:

Issues are presented concerning the development of microsatellite genetic markers which can be used to trace Atlantic cod to their population of origin and therefore assist in identifying poachers and policing regulations.

Laws, regulations and rules, Cod fishing

Similar abstracts:

• Abstracts: Biological response to climate change on a tropical mountain. Helping western forests heal
• Abstracts: Contexts and social correlates of long-distance calling by male chimpanzees. Primate colour predicts social status and aggressive outcome
• Abstracts: Proximate and ultimate causes of adoption in ring-billed gulls. Deciding where to settle: conspecific attraction and web site selection in the orb-web spider Nephilengys cruentata
• Abstracts: Source of volcanic glass for ancient Andean tools. Human presence in the European Arctic nearly 40,000 years ago
• Abstracts: Two distinct actions of retinoid-receptor ligands. Low nitrate:phosphate ratios in the global ocean. Photochemical cycling of iron in the surface ocean mediated bu microbial iron(III)-binding ligands

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.