Fluorescent ornamentation in the Rhinoceros Auklet Cerorhinca monocerata

Ibis ◽  
2019 ◽  
Vol 161 (3) ◽  
pp. 694-698 ◽  
Author(s):  
Bradley P. Wilkinson ◽  
Michael E. Johns ◽  
Pete Warzybok
Keyword(s):  
Cerorhinca Monocerata ◽  
Rhinoceros Auklet

scholarly journals Applicability of the doubly labelled water method to the rhinoceros auklet, Cerorhinca monocerata

Biology Open ◽  
2012 ◽  
Vol 1 (11) ◽  
pp. 1141-1145 ◽  
Author(s):  
M. Shirai ◽  
M. Ito ◽  
K. Yoda ◽  
Y. Niizuma
Keyword(s):  
Doubly Labelled Water ◽  
Cerorhinca Monocerata ◽  
Rhinoceros Auklet

Resource allocation in fledglings of the rhinoceros auklet under different feeding conditions: an experiment manipulating meal size and frequency

2005 ◽  
Vol 83 (11) ◽  
pp. 1476-1485 ◽  
Author(s):  
Makiko Takenaka ◽  
Yasuaki Niizuma ◽  
Yutaka Watanuki
Keyword(s):  
Normal Group ◽  
Meal Size ◽  
High Group ◽  
Brain Mass ◽  
Cerorhinca Monocerata ◽  
Lipid Mass ◽  
Ammodytes Personatus ◽  
Fledging Mass ◽  
Rhinoceros Auklet ◽  
Large Meal

By manipulating meal size and frequency in an alcid, the rhinoceros auklet (Cerorhinca monocerata (Pallas, 1811)), we examined two hypotheses: (1) poorly fed chicks allocate resources preferentially to developing organs essential for fledging, and (2) intermittently fed chicks deposit more lipids than regularly fed ones. Chicks were fed normal (NORMAL; 40–80 g, mean meal mass in a normal year), small (LOW; 26–54 g, half of NORMAL), or large (HIGH; 80–160 g, twice as much as NORMAL) amounts of sandlance (Ammodytes personatus Girard, 1856) every day or the large meal (80–160 g) every 2 days (INTERMITTENT). Chicks fed more food grew faster. The HIGH group had the greatest fledging mass and shortest fledging period. The wingspan and brain mass of fledglings did not differ among groups. The heart, liver, and breast muscle at fledging were 15%–25% smaller in the LOW group than in the NORMAL group but did not differ between the NORMAL and HIGH groups. The total lipid was 43% greater in the HIGH group than in the NORMAL group, and that of the LOW group was 38% smaller. The INTERMITTENT group had a similar lipid mass to the NORMAL group. Chicks feeding on small meals seemed to maintain the growth of organs essential for fledging, while chicks feeding on large meals seemed to deposit a surplus as lipid rather than allocate more to the development of organs.

Diving behavior of an epipelagically feeding alcid, the Rhinoceros Auklet (Cerorhinca monocerata)

2003 ◽  
Vol 81 (7) ◽  
pp. 1249-1256 ◽  
Author(s):  
Maki Kuroki ◽  
Akiko Kato ◽  
Yutaka Watanuki ◽  
Yasuaki Niizuma ◽  
Akinori Takahashi ◽  
...  
Keyword(s):  
Feeding Habits ◽  
Dive Depth ◽  
Diving Behavior ◽  
Bottom Phase ◽  
Cerorhinca Monocerata ◽  
The Hours ◽  
Small Bird ◽  
Rhinoceros Auklet ◽  
Ascent Phase ◽  
Horizontal Bottom

The diving behavior of Rhinoceros Auklets (Cerorhinca monocerata) breeding at Teuri Island, Hokkaido, Japan, was studied using small bird-borne time–depth dataloggers. The eight auklets made dives without an obvious horizontal bottom phase to a median depth of 14.0 ± 1.8 (mean ± SD) m (maximum 57 m) for 53 ± 8 s (maximum 148 s) between the hours of 0300 and 2000. They made undulations (rapid depth changes), considered to represent prey pursuit, in 35% of the dives. Of the undulations, 57% occurred during the deep (>80% of maximum depth) parts of the dives and 26% during the ascent phase. The auklets performed 26 ± 31 dives continuously during dive bouts of 32 ± 34 min. Dive bouts at the end of the day were twice as long as in the morning and at midday. During dive bouts, the auklets showed consistent trends in dive depth, decreasing (23% of bouts), increasing (32%), or stable (19%), but sometimes they showed hectic depth changes (26%). V-shaped dives (with no horizontal bottom phase), potential prey pursuit in both the deep parts and ascent phases of the dives, and variable depth changes within dive bouts indicate the auklets' epipelagic feeding habits.

Common Ravens (Corvus corax) Prey on Rhinoceros Auklet (Cerorhinca monocerata) Eggs, Chicks, and Possibly Adults

2015 ◽  
Vol 127 (2) ◽  
pp. 336-339 ◽  
Author(s):  
James L. Hayward ◽  
Gordon J. Atkins ◽  
Ashley A. Reichert ◽  
Shandelle M. Henson
Keyword(s):  
Corvus Corax ◽  
Cerorhinca Monocerata ◽  
Rhinoceros Auklet

scholarly journals Do Rhinoceros Auklet, Cerorhinca monocerata, Fledglings Fly to the Sea from Their Natal Burrows?

2004 ◽  
Vol 118 (4) ◽  
pp. 615
Author(s):  
James L. Hayward ◽  
Jere K. Clayburn
Keyword(s):  
Cerorhinca Monocerata ◽  
Rhinoceros Auklet

The mode of departure of Rhinoceros Auklet fledglings from their nest burrows has remained uncertain. Both walk-down and fly-down hypotheses have been proposed. Here we use the unique geography of Protection Island, Washington, to evaluate the fly-down hypothesis. Some fledglings raised on Protection Island do appear to walk to the water, but our results suggest that many of the island’s fledgling Rhinoceros Auklets fly to the sea.

Rhinoceros Auklet (Cerorhinca monocerata)

1996 ◽  
Author(s):  
Anthony J. Gaston ◽  
S. B. Dechesne
Keyword(s):  
Cerorhinca Monocerata ◽  
Rhinoceros Auklet

scholarly journals Exposure to persistent organic pollutants is linked to over-wintering latitude in a Pacific seabird, the rhinoceros auklet, Cerorhinca monocerata

2021 ◽  
pp. 116928
Author(s):  
John E. Elliott ◽  
Mark C. Drever ◽  
Katharine R. Studholme ◽  
Veronica Silverthorn ◽  
Aroha A. Miller ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Cerorhinca Monocerata ◽  
Rhinoceros Auklet
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