![]() No significant relationships were observed between the GSI to the body and gonad lengths and between fecundity with those of the body and gonad lengths which indicate constancy of body length despite periodic variations of fecundity. tumba while the peaks in GSI and estimated AF in November, March and April indicate the spawning periods of A. The peaks in GSI and estimated AF in May, August and September indicate the approximate spawning periods of P. The five stages of oocytes maturation were immature, maturing, mature, ripe, and spent. Both species showed a female-favored population in most times of the year except in July for P. Monthly assessment was carried out to determine variations in sex ratio, gonadosomatic index (GSI), and stages of oocyte maturation as a measure to determine absolute fecundity (AF). Specifically, it aimed to assess some aspects of the reproductive biology of the two species (Puntius tumba and Anabas testudineus) that are endemic and threatened, respectively. In addition to the local pressures most often posed by human society, global pressure such as climate heating or plastic pollution are also taxing on many species.This study primarily aimed to generate basic data that is essential for the management and conservation efforts for the two economically-important fish species of Lake Lanao, Philippines. If we want more success stories like the bison’s, we need not only targeted and active conservation efforts - but also systemic changes in society. Rafał Kowalczyk, co-author of the new assessment and member of the IUCN SSC Bison Specialist Group. “To reduce the conflict risk and the bison’s dependence on supplementary feeding, it will be important to create protected areas that include open meadows for them to graze”, said in a statement Dr. However, herds are largely isolated from one another and confined to non-optimal forest habitats. There are currently 47 free-ranging European bison herds. The largest subpopulations are now found in Poland, Belarus, and Russia. The species survived only in captivity in the early 20th century and was reintroduced to the wild in the 1950s. The recovery is regarded as a “conservation success story” - one of the very few. The wild population of the European bison went from around 1,800 in 2003 to over 6,200 in 2019, justifying the move from vulnerable to the less serious near threatened category. ![]() The most recent update of the Red List is also proof that conservation efforts really pay off. Andrew Terry, Director of Conservation and Policy at ZSL. The Red List is a vital tool that helps us understand the pressures facing the diversity of life and therefore the conservation responses needed,” said Dr. “Seeing so many species joining the Extinct category, many of which have only just been discovered is heart-breaking. The discovery comes from a comprehensive assessment of the Protea family of flowering plants of the southern hemisphere. The IUCN sounded the alarm on the wild progenitor of the farmed macadamia nut, as three wild macadamia species are now threatened with extinction. Plants are also not spared by this assault. Meanwhile, freshwater fish species were most affected by predatory introduced species and over-fishing activities. There are also other 22 frog species listed as critically endangered across Central and South America. The frogs were driven to extinction by a deadly fungal disease known as chytridiomycosis, which has been linked to international trade routes. The species now declared extinct by IUCN include 15 freshwater fish species endemic to Lake Lanao and its outlet in the Philippines, three Central American frog species, three Macadamia species of protea (a genus of South African flowering plants) family, nine Asian oak species, and the recently-discovered lost shark. “To tackle global threats such as unsustainable fisheries, land clearing for agriculture, and invasive species, conservation needs to happen around the world.” “The growing list of extinct species is a stark reminder that conservation efforts must urgently expand,” Bruno Oberle, IUCN’s director-general, said in a statement.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |