Northern Leopard Frog Project: 2017 Field Season Report
Author: B. Houston
The main objectives for the 2017 field season were to: Monitor the population of LIPI in the CVWMA, using calling male surveys, egg mass surveys, visual encounter surveys and mark-recapture with passive integrated transponder (PIT) tags; Document LIPI breeding, locate and protect egg masses; Support re-introduction and captive assurance colony efforts.
Calling was detected primarily at WDLNA (in flooded field to the west and within main area) with very little calling detected at the EDLNA Pond. Aside from some calling detected in the DLNA North Peninsula, no calling was detected elsewhere. The first time in April that air and water temperatures at WDLNA reached the critical point at which Seburn indicated males tend to begin calling (10°C water and 15°C air; Seburn, 1992) was on April 22.
7 egg masses detected in the CVWMA, all at WDLNA, none for Leach Lake. Egg masses were detected between April 20 and May 25 and were estimated to have been laid between April 18 and May 22. Five of the 7 egg masses detected this year appeared to have average hatch-out, this includes all 5 that were laid in the flooded grass field adjacent to the WDLNA.
No tadpoles were trapped but while deploying traps on July 11 metamorphs with small tail stubs were detected, the first sign of metamorphosis for the year. Tadpoles (Gosner stage 39) and metamorphs were also detected at EDLNA ponds on July 18.
During VES a total of 139 LIPI detections were made between July 11 and October 26, a catch per effort of 1.1 LIPI per person-hour of survey effort.
There were 2 detections on the road, 1 on the south shore of Duck Lake and 1 on the shoreline of the Pumphouse channel east in the spring. A total of 178:26 person-hours of survey effort was dedicated to these surveys, with a combined total of 155 LIPI observations, a catch per effort of 0.87 LIPI/person-hour of survey effort.
In total there were 200 LIPI detections that were visually inspected for signs of chytridiomycosis during 2017, this includes 20 dead specimens (cause of death for majority was road mortality). Chytridiomycosis was suspected in 6 (3.0%), 1 adult and 5 juveniles all of which were detected during the spring breeding season at WDLNA.
In total during the 2017 field season 104 LIPI were PIT tagged: 11 adults, 5 juveniles and 88 YOY. Of these, 3 during incidental detections, 80 during late-summer and fall road surveys, 18 during visual encounter surveys and 3 during the spring migration.
Calling was detected primarily at WDLNA (in flooded field to the west and within main area) with very little calling detected at the EDLNA Pond. Aside from some calling detected in the DLNA North Peninsula, no calling was detected elsewhere. The first time in April that air and water temperatures at WDLNA reached the critical point at which Seburn indicated males tend to begin calling (10°C water and 15°C air; Seburn, 1992) was on April 22.
7 egg masses detected in the CVWMA, all at WDLNA, none for Leach Lake. Egg masses were detected between April 20 and May 25 and were estimated to have been laid between April 18 and May 22. Five of the 7 egg masses detected this year appeared to have average hatch-out, this includes all 5 that were laid in the flooded grass field adjacent to the WDLNA.
No tadpoles were trapped but while deploying traps on July 11 metamorphs with small tail stubs were detected, the first sign of metamorphosis for the year. Tadpoles (Gosner stage 39) and metamorphs were also detected at EDLNA ponds on July 18.
During VES a total of 139 LIPI detections were made between July 11 and October 26, a catch per effort of 1.1 LIPI per person-hour of survey effort.
There were 2 detections on the road, 1 on the south shore of Duck Lake and 1 on the shoreline of the Pumphouse channel east in the spring. A total of 178:26 person-hours of survey effort was dedicated to these surveys, with a combined total of 155 LIPI observations, a catch per effort of 0.87 LIPI/person-hour of survey effort.
In total there were 200 LIPI detections that were visually inspected for signs of chytridiomycosis during 2017, this includes 20 dead specimens (cause of death for majority was road mortality). Chytridiomycosis was suspected in 6 (3.0%), 1 adult and 5 juveniles all of which were detected during the spring breeding season at WDLNA.
In total during the 2017 field season 104 LIPI were PIT tagged: 11 adults, 5 juveniles and 88 YOY. Of these, 3 during incidental detections, 80 during late-summer and fall road surveys, 18 during visual encounter surveys and 3 during the spring migration.
Resources Data:
Name: WSI_4955_RPT_2017.PDF
Format:
URL: http://a100.gov.bc.ca/pub/siwe/details.do?id=4955
Additional Info
Study Years: 2017
Published: 2018
Northern Leopard Frog Project: 2017 Field Season Report
Author: B. Houston
Tags: Breeding Surveys, Captive Rearing, Kootenay River, Lithobates Pipiens, Northern Leopard Frog, Population Recovery, Reintroduction, Wetland, Wildlife
The main objectives for the 2017 field season were to: Monitor the population of LIPI in the CVWMA, using calling male surveys, egg mass surveys, visual encounter surveys and mark-recapture with passive integrated transponder (PIT) tags; Document LIPI breeding, locate and protect egg masses; Support re-introduction and captive assurance colony efforts.
Summary
Calling was detected primarily at WDLNA (in flooded field to the west and within main area) with very little calling detected at the EDLNA Pond. Aside from some calling detected in the DLNA North Peninsula, no calling was detected elsewhere. The first time in April that air and water temperatures at WDLNA reached the critical point at which Seburn indicated males tend to begin calling (10°C water and 15°C air; Seburn, 1992) was on April 22.
7 egg masses detected in the CVWMA, all at WDLNA, none for Leach Lake. Egg masses were detected between April 20 and May 25 and were estimated to have been laid between April 18 and May 22. Five of the 7 egg masses detected this year appeared to have average hatch-out, this includes all 5 that were laid in the flooded grass field adjacent to the WDLNA.
No tadpoles were trapped but while deploying traps on July 11 metamorphs with small tail stubs were detected, the first sign of metamorphosis for the year. Tadpoles (Gosner stage 39) and metamorphs were also detected at EDLNA ponds on July 18.
During VES a total of 139 LIPI detections were made between July 11 and October 26, a catch per effort of 1.1 LIPI per person-hour of survey effort.
There were 2 detections on the road, 1 on the south shore of Duck Lake and 1 on the shoreline of the Pumphouse channel east in the spring. A total of 178:26 person-hours of survey effort was dedicated to these surveys, with a combined total of 155 LIPI observations, a catch per effort of 0.87 LIPI/person-hour of survey effort.
In total there were 200 LIPI detections that were visually inspected for signs of chytridiomycosis during 2017, this includes 20 dead specimens (cause of death for majority was road mortality). Chytridiomycosis was suspected in 6 (3.0%), 1 adult and 5 juveniles all of which were detected during the spring breeding season at WDLNA.
In total during the 2017 field season 104 LIPI were PIT tagged: 11 adults, 5 juveniles and 88 YOY. Of these, 3 during incidental detections, 80 during late-summer and fall road surveys, 18 during visual encounter surveys and 3 during the spring migration.