Study

Benefits derived from opportunistic survival-enhancing interventions for the Hawaiian monk seal: the silver BB paradigm

  • Published source details Harting A.L., Johanos T.C. & Littnan C.L. (2014) Benefits derived from opportunistic survival-enhancing interventions for the Hawaiian monk seal: the silver BB paradigm. Endangered Species Research, 25, 89-96.

Actions

This study is summarised as evidence for the following.

Action Category

Remove derelict fishing gear from mammals found entangled

Action Link
Marine and Freshwater Mammal Conservation

Reunite abandoned marine and freshwater mammal young with parents

Action Link
Marine and Freshwater Mammal Conservation

Translocate marine and freshwater mammals to re-establish or boost native populations

Action Link
Marine and Freshwater Mammal Conservation

Rescue and release stranded or trapped marine and freshwater mammals

Action Link
Marine and Freshwater Mammal Conservation
  1. Remove derelict fishing gear from mammals found entangled

    A review of interventions in 1980–2012 for Hawaiian monk seals Monachus schauinslandi in the North Pacific Ocean, Hawaii, USA (Harting et al. 2014) found that removing derelict fishing gear from seals, along with at least seven other interventions to enhance survival, resulted in 139 of 532 (26%) seals surviving and reproducing. The study did not distinguish between the effects of removing derelict fishing gear and the other interventions carried out. The 139 surviving seals (including 71 females) produced at least 147 pups, which also went on to reproduce (15 pups). In 2012, the number of surviving seals and their offspring were estimated to make up 17–24% of the seal population (198–271 of 1,153 seals). In 1980–2012, a total of 885 intervention events of seven types were carried out: removal of derelict fishing gear from seals (275 events); translocation (284 events); rescue of stranded or trapped seals (37 events); pups reunited with mothers (113 events); umbilical cord removed or other medical treatment (84 events); other actions, such as deterring aggressive male seals (120 events). Field biologists monitored the seal population in 1980–2012. Data were analysed for 532 individual seals facing severe mortality risks and involved in 698 of the 885 intervention events.

    (Summarised by: Anna Berthinussen)

  2. Reunite abandoned marine and freshwater mammal young with parents

    A review of interventions in 1980–2012 for Hawaiian monk seals Monachus schauinslandi in the North Pacific Ocean, Hawaii, USA (Harting et al. 2014) found that reuniting seal pups with their mothers, along with at least seven other interventions to enhance survival, resulted in 139 of 532 (26%) seals surviving and reproducing. The study did not distinguish between the effects of reuniting pups with their mothers and the other interventions carried out. The 139 surviving seals (including 71 females) produced at least 147 pups, which also went on to reproduce (15 pups). In 2012, the number of surviving seals and their offspring were estimated to make up 17–24% of the seal population (198–271 of 1,153 seals). In 1980–2012, a total of 885 intervention events of seven types were carried out: pups reunited with mothers (113 events); removal of derelict fishing gear from seals (275 events); translocation (284 events); rescue of stranded or trapped seals (37 events); umbilical cord removed or other medical treatment (84 events); other actions, such as deterring aggressive male seals (120 events). Field biologists and monitored the seal population in 1980–2012. Data were analysed for 532 individual seals facing severe mortality risks and involved in 698 of the 885 intervention events.

    (Summarised by: Anna Berthinussen)

  3. Translocate marine and freshwater mammals to re-establish or boost native populations

    A review of interventions in 1980–2012 for Hawaiian monk seals Monachus schauinslandi in the North Pacific Ocean, Hawaii, USA (Harting et al. 2014) found that translocating seals, along with at least seven other interventions to enhance survival, resulted in 139 of 532 (26%) seals surviving and reproducing. The study did not distinguish between the effects of translocation and the other interventions carried out. The 139 surviving seals (including 71 females) produced at least 147 pups, which went on to reproduce (15 pups). In 2012, the number of surviving seals and their offspring were estimated to make up 17–24% of the seal population (198–271 of 1,153 seals). In 1980–2012, a total of 885 intervention events of seven types were carried out: translocation (284 events); removal of derelict fishing gear from seals (275 events); rescue of stranded or trapped seals (37 events); pups reunited with mothers (113 events); umbilical cord removed or other medical treatment (84 events); other actions, such as deterring aggressive male seals (120 events). Field biologists monitored the seal population in 1980–2012. Data were analysed for 532 individual seals facing severe mortality risks and involved in 698 of the 885 intervention events.

    (Summarised by: Anna Berthinussen)

  4. Rescue and release stranded or trapped marine and freshwater mammals

    A review of interventions in 1980–2012 for Hawaiian monk seals Monachus schauinslandi in the North Pacific Ocean, Hawaii, USA (Harting et al. 2014) found that rescuing and releasing stranded or trapped seals, along with at least seven other interventions to enhance survival, resulted in 139 of 532 (26%) seals surviving and reproducing. The study did not distinguish between the effects of rescuing stranded or trapped seals and the other interventions carried out. The 139 surviving seals (including 71 females) produced at least 147 pups, which also went on to reproduce (15 pups). In 2012, the number of surviving seals and their offspring were estimated to make up 17–24% of the seal population (198–271 of 1,153 seals). In 1980–2012, a total of 885 intervention events of seven types were carried out: rescue of stranded or trapped seals (37 events), translocation (284 events); removal of derelict fishing gear from seals (275 events); pups reunited with mothers (113 events); umbilical cord removed or other medical treatment (84 events); other actions, such as deterring aggressive male seals (120 events). Field biologists monitored the seal population in 1980–2012. Data were analysed for 532 individual seals facing severe mortality risks and involved in 698 of the 885 intervention events.

    (Summarised by: Anna Berthinussen)

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