29th September, 2012
Courtesy of the Parque Natural da Madeira Service, TMG is happy to make available the PDF version of Rosa Pires’ new illustrated book, Monk Seals of the Archipelago of Madeira (bilingual, English and Portuguese).
The book features sections on the biology and conservation of the species, and with monk seals recovering sufficiently to recolonise the main island of Madeira, steps members of the public can take to record and report their sightings.
Rosa Pires, a field biologist for the Parque Natural da Madeira Service, has been instrumental in the monk seal’s recovery in the Madeira archipelago.
Pires, R. 2011. Lobos-Marinhos do Arquipélago da Madeira. Monk Seals of the Archipelago of Madeira. Servicço do Parque Natural da Madeira, Funchal: 1-60. [PDF 7.7 MB]
16th June, 2012
Media Watch, Washington Examiner, 15 June 2012
Some fishermen blame the endangered species for stealing their catch. There are unfounded rumors that they devour and deplete fish stocks. And at least four of them have been killed by humans in Hawaii since late last year.
To help correct the misconceptions, government scientists plan to glue submersible cameras onto the seals’ backs, using the footage to prove to fishermen the animals are not harming their way of life. It may even end up on reality TV. [More]
For further information on the project: http://www.monksealfoundation.org/research.aspx
Source: Scientists to strap cameras to Hawaiian seals, Washington Examiner, 15 June 2012.
3rd March, 2012
Murphy S, Spradlin TR, Mackey B, McVee J and others. 2012. Age estimation, growth and age-related mortality of Mediterranean monk seals Monachus monachus. Endangered Species Research 16:149-163. [PDF 1.4]
ABSTRACT: Mediterranean monk seals Monachus monachus are classified as Critically Endangered on the IUCN Red List, with <600 individuals split into 3 isolated sub-populations, the largest in the eastern Mediterranean Sea. Canine teeth collected during the last 2 decades from 45 dead monk seals inhabiting Greek waters were processed for age estimation. Ages were best estimated by counting growth layer groups (GLGs) in the cementum adjacent to the root tip using unprocessed longitudinal or transverse sections (360 µm thickness) observed under polarized light. Decalcified and stained thin sections (8 to 23 µm) of both cementum and dentine were inferior to unprocessed sections. From analysing patterns of deposition in the cementum of known age-maturity class individuals, one GLG was found to be deposited annually in M. monachus. Ages ranged from 0.5 to 36 yr for females, 0.5 to 21 yr for males and 0.5 to 25.5 yr for individuals of unknown sex. The majority of seals (65%) were considered adults (≥4 yr), followed by juveniles (20%, <1 yr) and sub-adults (15%, 1−3.9 yr). Thirty percent of the aged sample had died from human-related causes, such as accidental entanglement in fishing gear and direct killings. A single-Gompertz growth curve was generated for both sexes using standard length data, resulting in asymptotic values of 212.3 cm for females and 221.8 cm for males. This study represents the first quantitative glimpse of sex-specific growth in monk seals and the age structure of dead individuals in this rare species’ core range.