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n~~o/~ [J)~ 0/ ff~ rMWi 1fIdd¥ ffwld ~taJ<.lM<4, 1fI~ 015J'f 1 November 1982 To: Tern Workshop Participants From: Bradford G. Blodget, Assistant Director, Nongame and Endangered Species Subject: Tern Census and Inventory Data Normal settlement and colony establishment by the least tern was severely be lated in 1982 by protracted rains and recurrent storms, a situation that made census taking even more difficult than usual for the least tern. Nevertheless, the 1,812 pairs inventoried compared with 1,856 pairs in 1981 and suggested little fundamental fluctuation of the base population. A general decline in the nlli~ber of breeding stations for the least tern from 40 in 1980 to 35 in 1982 reflects the combination for reporting purposes of the various small colonies along the Provincetown outer beach from Exit 9 to Race Point. Numer ically, the least tern population, possibly owing to the difficult June period, was very dispersed in 1982, with seven colonies of over 100 pairs.· These were Long Beach, Barnstable (120 pairs), West Dennis Beach, Dennis (110 pairs), North Beach, Chatham (250 pairs), Nauset Heights, Orleans (158 pairs), Nauset Spit, Eastham (115 pairs), Nashawena Island, Gosnold (122 pairs), and Low Beach, Nantucket (175 pairs). In 1981, with less disruptive weather during the settlement period, there were but three colonies larger than 100 pairs (one had 415 pairs). The common tern nested at 22 stations in 1982 (versus 18 in 1981) and total pairs rose to 7,577. More than offsetting a 25 percent decline from 1981 at the Monomoy colony to 1,500 pairs, were major increases over 1981 at Wood bridge Island, Newburyport (150 to 200), Hog Island, Hull (130 to 190), Plymouth Beach (550 to 800), Gray's Beach, West Yarmouth (860 to 1,500), West Dennis Beach, Dennis (260 to 400), New Island, Orleans and Eastham (520 to 1,100) and Nashawena Island, Gosnold (50 to 110). Roseate ~rns increased seven percent to 1,986 pairs in 1982, continuing a virtually stable long-term population picture. Nesting was recorded at nine stations in 1982 (versus five in 1981) but the only substantial colonies away from Bird Island, Marion were Gray's Beach, Yarmouth (110 pairs) and the Sarson's Inlet area at Sengekontacket Pond on Martha's Vineyard (30 pairs). At the latter site, Felix Neck Trust successfully completed an elevated 4 foot by 8 foot sandbox platform as a pilot project to aid terns that were season ally washed out at Sarson's Island. Eight pairs of common terns raised young on this platform in 1982 and expansion of this effort is planned for 1983. MASSACHUSETTS TERN INVENTORY 1982 The following data represent best estimates of populations of the four species of breeding terns present in 1982. Except for Least Tern, the estimates are for the period June 1-20. In the case of Least Tern, steady rains and storms prevented normal settlement and colony establishment in the early June period and resulted in an unusually late nesting season. The abbreviation "P" indicates that birds were lmown or believed to have been present but census data are unavailable for the location. All numbers represent pairs. No. Colony Least Cornmon Roseate Arctic o Salisbury 35 1 Woodbridge Is., Newburyport 200 2 Crane's Beach, Ipswich 9 3a Plum Island Marsh area 160 3b Plum Island Refuge 15 4 Plum Island State Park, Ipswich 62 5 Milk Island, Rockport 6 Tinker's Island, Salem 125 7 Snake Island, Winthrop B Hog Island, Hull 190 9 Third Cliff, Scituate P 10 Fourth Cliff, Scituate 11 Duxbury Beach, Duxbury 5 12 Plymouth Beach, Plymouth 40 BOO 11 9 13 Bird Island, Marion 650 1,BOO 14 Ram Island, Mattapoisett 15 Fairhaven area l6a Barney's Joy, Dartmouth 30 l6b Salter's Point, Dartmouth l6c Gooseberry Neck, Dartmouth l7a South Cape Beach, Mashpee l7b Washburn Island, Falmouth 10 l7c Popponesset Beach, Mashpee lB Old Harbor Beach, N. Sandwich lB 1 19 Scorton Creek, Sandwich 32 20 Dead Neck-Sampson's Is., Barnst. 33 450 3 2la Craigville Beach, Barnstable 2lb Long Beach, Barnstable 120 40 22 Kalmus Beach, Barnstable 1 23 Sandy Neck, Barnstable 22 24 Gray's Beach, W. Yarmouth 1,500 100 25 West Dennis Beach, Dennis 110 400 5 26 Monomoy Wilderness, Chathaml P 1,500 3 27a Harding's Beach, Chatham 27b Harding's Beach Point, Chatham 27c North Beach, Chatham 250 2Ba Nauset Heights, Orleans l5B 2Bb Nauset Spit, Eastham 115 15 4 lalso 600 prs. of Laughing Gull MASSACHUSETTS TERN INVENTORY (concluded) No. Colony Least Corrnnon Roseate Arctic 29 New Island, Eastham & Orleans2 1,100 12 3 30 Marconi Station, Wellfleet 39 3la Jeremy Point, Wellfleet 3lb Great Island, Wellfleet 6 32a Pamet area, Truro 42 32b Pilgrim Beach, Truro 12 33a High Head area, Truro 45 33b Outer Beach (Exit 9 to Race Point), Provincetown 56 34 Wood End Light, Provincetown 35 35 Long Point, Provincetown 36a Nashawena Island, Gosnold 122 110 36b Penikese Island, Gosnold 36c Cuttyhunk Island, Gosnold 36d Pas que Island, Gosnold 5 37 Noman's Land, Chilmark, M.V. 5 100 10 2 38a Nantucket Wildlife Refuge 38b Coskata-Coatue W.R., Nantucket 30 1 1 38c Coatue Wildlife Ref., Nantucket 39 Quidnet, Nantucket 40a Siasconset, Nantucket 40b Cisco Beach, Nantucket 40c Eel Point, Nantucket 40d Quaise Point, Nantucket 40e Tom Never's Head, Nantucket 40f Surfside, Nantucket 40g Nantucket (other) 4la Tuckernuck Island, Nantucket 4lb Muskeget Island, Nantucket 42 Chappaquidick Island, M.V. 80 43 Tashmoo Spit, M.V. 60 44 Cape Pogue W.R., M.V. 15 1 45 Sarson's Inlet area, M.V. 50 30 46 Norton's Point (Katama), M.V. 15 47 Martha's Vineyard (other) 404 TOTAL PAIRS: 1,812+ 7,577 1,986 23 TOTAL COLONIES: 35 22 9 7 2also included 2 prs. of Laughing Gull 3Low Beach 4Eastville Beach ~enemsha Pond Unfortunately, the Arctic tern picture took a steep turn for the worse in 1982, dropping to 23 pairs distributed among seven stations. This continues a steady decline from 53 pairs in 1978 to 45-plus in 1979, 39 in 1980 and 31 in 1981. The reasons for this decline are not well understood. I will be contacting each of you during the coming winter regarding details of the spring workshop on tern management which was favorably discussed at the August meeting. .